COMMITTEE DRAFT UGANDA 
STANDARD  
  CDUS 249-1 
Second  Edition  
2018 -mm-dd 
 
 
 Reference number  
CDUS 249-1: 2018 
© UNBS 2018   
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
Engine Oil — Performance Classifications — Part 1: General  
 CDUS249-1: 2018  
ii © UNBS 2018  – All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Us ers are 
responsible for its correct application  
© UNBS 2017   
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
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permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: +256 41 4 333 2 50/1/2/3  
Fax: +256 41 4 286 123 
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  CDUS 249-1:2018  
© UNBS 2018  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 Abbreviated terms  ................................ ................................ ................................ ................................ . 2 
5 General Classification  ................................ ................................ ................................ ...........................  2 
5.1 Classification according to viscosity  ................................ ................................ ................................ .. 2 
5.2 Classification according to performance ................................ ................................ ............................  3 
5.2.1  API service classification  ................................ ................................ ................................ .....................  3 
5.2.2  ACEA service classification  ................................ ................................ ................................ .................  3 
5.2.3  ISO service classification  ................................ ................................ ................................ .....................  3 
5.2.4  JASO service classification  ................................ ................................ ................................ .................  3 
5.3 Performance Classifications according to service categories  ................................ .........................  3 
5.3.1  Engine Oils for Spark ignition Engines  ................................ ................................ ...............................  3 
5.3.2  Engine Oils for Compression ignition engines  ................................ ................................ ..................  4 
5.3.3  Engine oil for four -stroke motorcycle gasoline engine  ................................ ................................ ..... 4 
5.3.4  Engine oil for two -stroke cycle motorcycle gasoline engine ................................ ............................  4 
Annex  A (informative)  Current (non -obsolete)and Obsolete Engine Oil Categories  ................................ . 6 
A.1 API Categories  ................................ ................................ ................................ ................................ ....... 6 
A.1.1  Spark ignition petrol engine application  ................................ ................................ .............................  6 
A.1.2  Compress ion ignition diesel engine application  ................................ ................................ ...............  6 
A.2 ACEA Categories  ................................ ................................ ................................ ................................ ... 9 
A.2.1  current spark ignition petrol engine and Compression igniti on diesel engine application  ..........  9 
A.2.2  Catalyst compatibility oils  ................................ ................................ ................................ ....................  9 
A.2.3  Heavy Duty Diesel engine oils  ................................ ................................ ................................ .............  9 
A.3 Engine oil Categories for two -stroke cycle motorcycle gasoline engine applications  ................  10 
A.3.1  JASO Specifications  ................................ ................................ ................................ ...........................  10 
A.3.2  ISO Specifications  ................................ ................................ ................................ ...............................  10 
A.3.3  API Specifications  ................................ ................................ ................................ ...............................  11 
Bibliography  ................................ ................................ ................................ ................................ ......................  12 
 CDUS249-1: 2018  
iv © UNBS 2018  – All rights reserved  
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade , Industry and 
Cooperatives established under Cap 327 , of the Laws of Uganda , as amended .  UNBS is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT  Agreement  of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of key stakeholders 
including government, academia, consumer groups, private se ctor and other interested parties.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval  and declaration as Uganda Standards by the National Standards Council.  
The committee responsible for this document is Technical Committee UNBS /TC 16, [Petroleum Products and 
Facilities ], Subcommittee SC 1, [Petroleum and Petrochemicals Products] . 
This second edition cancels and replaces the first edition ( US 249-2000), which has been technically revised.  
US 249 consists of the following parts, under the general title Engine Oil — Performance Classifications  
  Part 1: General  
  Part 2: API Specification fo r Spark Ignition (petrol) engines   
  Part 3: API Specification for light and heavy duty Compression ignition (diesel) engines  
  Part 4:  Specification for internal combustion e ngine oils used in four -stroke cycle motorcycle 
gasoline engines and associated d rive trains  
  Part 5: Specification for Internal Combustion engine oils used in two -stroke cycle motorcycle 
gasoline engines and associated drive trains  CDUS 249-1:2018  
© UNBS 2018  – All rights reserved  v 
 Introduction  
Due to the technological advances that have occurred since the publishment of US 249:2000 / EAS 159, it has 
become necessary to keep abreast with such changes hence the revision of this standard.  
It has become necessary to s ub-divide this standard into five  parts.  
DUS 249 -1:201 7, Engine Oil  — Performance Classifications  — Part 1: General,  
DUS 249 -2:201 7, Engine Oils  —Performance Classifications  — Part 2: API Specification for Spark Ignition 
(petrol) Engine s 
DUS 249 -3: 201 7, Engine Oil  — Performance Classification  — Part 3: API Specification for light and heavy 
duty compression Ignition  (diese l) engine s 
DUS 249 - 4: 201 7, Engine Oil  — Performance Classification  — Part 4: Specification for internal combustion 
engine oils used in four -stroke cycle motorcycle gasoline engines and associated drive trains  
DUS 249 -5: 201 7 Engine Oils — Performance Cla ssification — Part 5: Specification for Internal Combustion 
engine oils used in two -stroke cycle motorcycle gasoline engines and associated drive trains  
This standard outlines the current (non - obsolete) and obsolete performance classificat ions as applica ble to 
API, ACEA , JASO  and ISO Oil sequences . 
Note: Current engine oil categories that may be deemed obsolete by API , ACEA, JASO and ISO  during 
the course of the application of this standard shall be considered obsolete as well.  
 
 
 
 
 
  
 COMMITTEE DRAFT UGANDA STANDARD  CDUS 249-1: 2018 
 
© UNBS  2018  – All rights reserved  1 
 Engine Oil  — Perfo rmance Classifications  — Part 1: General  
1 Scope   
This Draft Uganda Standard covers classifi cation for crankcase engine  oils, for automotive type internal 
combustion  and spark -ignition  engines , two stroke  and four -stroke cycle  motorcycle  engines that  emplo y a 
crankcase scavenging system . 
Note:  1 The consumer should  refer to the owner’s or operator’s manual for recommended category of engine oil to 
be used in a specific engine . 
2 Normative references   
The following referenced documents referred to in the tex t in such a way that some or all of their content 
constitutes requirements of this document. For dated references, only the edition cited applies. For undated 
references, the latest edition of the referenced document (including any amendments) applies.  
DUS  249-2:2018 , Engine Oil — Performance Classification — Part 2 : API Specification for Spark Ignition  
(petrol)  Engines   
DUS 249 -3:2018 , Engine Oil  — Performance Classifi cation — Part 3 : API Specification for  light and heavy 
duty internal combustion  Compressi on Ignition  (diesel)  Engines   
DUS 249 -4:2018 , Engine Oil — Performance Classification — Part 4: Specification for Internal Combustion 
engine oils used in four -stroke cycle motorcycle gasoline engines and associated drive trains   
DUS 249 -5:2018 , Engine Oils  — Performance Classification —Part 5: Specification for Internal Comb ustion 
engine oils used in two -stroke cycle motorcycle gasoline engines and associated drive trains   
3 Terms and definitions   
For the purposes of this document, the following terms and de finitions apply.  
3.1 
engine oil  
lubricating liquid with additives that reduces friction or wear or both, between the moving parts within an 
engine; removes heat, serves as a combustion - gas sealant for piston rings; and reduces potentially harmful 
effects  such as rusting, deposit formation, oil oxidation and foaming resulting from engine operation.  
3.2  
category  
a designation such as SJ, SL, A1, energy conserving, resource conserving and so forth, for a given level of 
performance in specified engine and bench tests.  
3.3 
classification  
the systematic arrangement into categories in accordance with different levels of performance in specified 
engine and bench tests.   
2 © UNBS 2018 – All rights reserved  
 3.4 
internal combustion engine  
an engine in which the burning of a fuel occurs in a confin ed space called a combustion chamber.  
3.5 
light duty engine  
an engine characterized by average speeds, power output and internal temperatures that are generally much 
lower than the potential maximums.  
3.6  
heavy duty engine  
an engine characterized by av erage speeds, power output, and internal temperatures that are generally close 
to potential maximums  
4 Abbreviated term s 
4.1 
ACEA  
Association des Constructeurs Européens d'Automobiles (European Automobile Manufacturer’s Association )  
4.2  
API  
American Pe troleum Institute  
4.3  
ASTM  
American Society of Testing and Materials  
4.4  
ILSAC  
International Lubricant Standardisation & Approval Committee  
4.5  
ISO  
International Organisation for Standardisation  
4.6  
JASO  
Japanese Automotive Standards Organisati on 
4.7 
SAE 
Society of Automotive Engineers  
5 General Classification  
Engine oils shall b e classified according to viscosity  grade  and performance  
5.1 Classification according to viscosity  
The viscosity of the lubricating oil shall be classified as either si ngle grade or multi -grade basing on the SAE 
viscosity grades, as per designations indicated in SAE J300 _201501  CDUS 249-1: 2018  
© UNBS  2018  – All rights reserved  3 
 5.2 Classification according to performance  
Engine oil shall be classified according to performance based on API, ACEA, ISO, and JASO service 
classification  
5.2.1 API service classification  
Automotive engine oils are classified in two general groups by API. Those designated with ; 
a) S prefix intended for  use in gasoline powered automobiles  
b) C prefix  intended for use in diesel powered automobiles  
5.2.2  ACEA service classification  
Automotive engine oils are classified in three general groups by ACEA. Those designated with  
a) A prefix intended for use in gasoline powered automobiles  
b) B prefix intended for use in light duty diesel powered automobiles  
c) E prefix intended for use in heavy  duty diesel powered vehicle  
5.2.3  ISO service classification  
a) EM  prefix intended for use in four -stroke cycle motorcycle gasoline engine  
b) EG prefix intended for use two -stroke cycle motorcycle gasoline engine  
5.2.4  JASO service clas sification  
a) M prefix intended for use four -stroke cycle motorcycle gasoline engine  
b) F prefix intended for use two -stroke cycle motorcycle gasoline engine  
5.3 Performance Classifications  according to service categories  
5.3.1  Engine Oil s for Spark ignition Eng ines 
The categories of engine oils intended for use in automotive gasoline engine application;  
API “Sx” series x = A, B, C, D, E, F, G, H, J, L, M or N  
ACEA “Ax” series x = 1, 3 or 5 
ACEA “Cx” series x = 1, 2, 3, 4 , 5 catalyst compatible oils as used for g asoline and diesel engines with after 
treatment devices  
5.3.1 .1 The current (non -obsolete) categories are: API: SJ, SL, SM, SN  and A CEA: A1, A3 , A5, C1, C2, 
C3, C4 and C5  
5.3.1.2 Engine oils for spark ignition (petrol) engines shall have a performance not lower than that 
defined by API SJ , and ACEA A1 or ACEA C1, and shall meet specifications in CDUS 249 -2.  
4 © UNBS 2018 – All rights reserved  
 5.3.2  Engine Oils for Compression ignition engines  
5.3.2.1 Light duty diesel engine  
The categories of engine lubricating oils intended for use in  light duty compression ignition engines ;  
API:  “Cx” series x = A, B,  C, D, E, F, G, H, I, J or K  
ACEA:  “Bn” series n = 1, 3, 4 or 5  
iv) ACEA: “Cn” series n= 1, 2, 3, 4, 5 catalyst compatible oils as used for gasoline and diesel engines with 
after treatment d evices.   
5.3.2.1.1  The current (non -obsolete) categories are: API  CH-4, Cl-4, Cl-4 Plus,  CJ- 4, CK-4 and/or ACEA: 
B1, B3, B4, B5, C1, C2, C3,  C4 and C5  
5.3.2.1.2  Engine oils for  light duty  compression ignition engines shall have a performance not lower th an 
that defined by API C H-4 and ACEA B1 or  C1 and shall meet specifications in CDUS 249 -3. 
5.3.2.2  Heavy duty automobiles diesel engine  
The categories of engine oils that are intended for use in  heavy duty  compression ignition engines  
API:  “Cx” series x =A, B, C, D, F, G, H, I,  J, K or FA   
ACEA: “En” series n = 4, 6, 7, or 9  
5.3.2.2.1  The current (non -obsolete)  categories are: API CH-4, CI -4, Cl-4-Plus CJ-4, CK -4, FA -4 and/or 
ACEA: E4, E6, E7 or  E9  
5.3.2.2.2 Engine oils for heavy duty compression igniti on engines shall have a performance not low er than 
that defined by API CH -4 and ACEA E4, and shall meet specifications in DUS 249 -3 
5.3.3  Engine oil for four-stroke m otorcycle gasoline engine  
The categories of engine oils that are intended for use in four -stroke  cycle  motorcycle  gasoline  engines;  
JASO “Mx” series x = A (A1 and A2)  and B or the equivalent ISO categories EMA1, EMA2 and EMB 
respectively  
5.3.3.1 Current (non -obsolete) categories are JASO: MA (MA1 and MA2) and  MB or their ISO equivalent 
EMA1, EM A2 and EMB.  
5.3.3.2 Engine oils for four -stroke  cycle  motorcycle  gasoline  engine s shall have a performance equivalent to 
that specified in DUS 249 - 4  
5.3.4  Engine oil for two-stroke  cycle m otorcycle gasoline engine  
The categories of engine oils that are  intended primarily for use in two -stroke  cycle  motorcycle engines;  
API “Tx” series x= A, B, C and  D  
JASO “Fx” series x = A, B, C and  D  
ISO “EGx” series x = A, B. C and D.  
Note: Category FA, EGA, TA, TB and TD are currently Obsolete.   CDUS 249-1: 2018  
© UNBS  2018  – All rights reserved  5 
 5.3.4 .1 The curren t (non -obsolete) categories are: API: TC, JASO: FB, FC and FD or equivalent ISO : EGB, 
EGC and EGD.  
5.3.4.2  Engine oils for two stroke motorcycle engine application shall have a performance equivalent to that 
specified in DUS 249 - 5 
  
6 © UNBS 2018 – All rights reserved  
 Annex  A 
(informative)  
 
Current (non -obsolete)and Obsolete Engine Oil Categories  
A.1 API Categories  
A.1.1 Spark ignition petrol engine application  
Current and obsolete  API service categories are listed below. For automotive gasoline engine, the latest API 
service category includ es performance properties of each earlier category and can be used to service older 
engines where earlier category oils are recommended.  
Table A.1 — Table showing current and Obsolete API engine oil categories  
Category  Status  Service  
SN Current  Introduced  in October 2010 for 2011 and older vehicles, designed to provide improved 
high temperature deposit protection for pistons, more stringent sludge control, and seal 
compatibility. API SN with Resource conserving matches ILSAC GF -5 by combining API 
SN perfor mance with improved fuel economy, turbocharger protection, emission control 
system compatibility, and protection of engines operating on ethanol -containing  fuel up to 
E85. 
SM Current  For 2010 and older automotive engines.  
SL Current  For 2004 and older au tomotive engines.  
SJ Current  For 2001 and older automotive engines.  
SH Obsolete  For 1994 and older  automotive engines  
SG Obsolete  For 1993 and older automotive engines  
SF Obsolete  For 1988 and older automotive engines  
SE Obsolete  CAUTION: Not suitab le for use in gasoline -powered automotive engines built after 1979.  
SD Obsolete  CAUTION: Not  suitable for use in gasoline -powered automotive engines built after 1971. 
Use in more modern  engines may cause unsatisfactory performance or equipment harm.  
SC Obsolete  CAUTION: Not suitable for use in gasoline -powered automotive engines built after 1967. 
Use in more modern engines may cause unsatisfactory performance or equipment harm.  
SB Obsolete  CAUTION: Not suitable for use in gasoline -powered automotive eng ines built after 1951. 
Use in more modern engines may cause unsatisfactory performance or equipment harm.  
SA Obsolete  CAUTION: Contains no additives. Not suitable for use in gasoline -powered automotive 
engines built after 1930. Use in more modern engines  may cause unsatisfactory 
performance or equipment harm.  
Note:   Categories indicated as obsolete do not meet requirements for this standard or any other related Uganda standard on E ngine Oil  
 
A.1.2 Compression ignition diesel engine application  CDUS 249-1: 2018  
© UNBS  2018  – All rights reserved  7 
  
Table  A.2 — Table showing current (non -obsolete) and Obsolete API Categories of Engine oil  
 
Category  Status  Service  Backward Compatibility  
CK-4 Current  API Service Category CK -4 describes oils for use in high -
speed four -stroke cycle diesel engines designed to meet 2017 
model year on -highway and Tier 4 non -road exhaust emission 
standards as well as for previous model year diesel engines. 
These oils are formulated for use in all applications with diesel 
fuels ranging in sulfur content up to 500 ppm (0.05% by 
weight). However, the use of these oils with greater than 15 
ppm (0.0015% by weight) sulfur fuel may impact exhaust after 
treatment system durability and/or oil drain interval. These oils 
are especially effective at sustaining emission control system 
durabilit y where particulate filters and other advanced after 
treatment systems are used. API CK -4 oils are designed to 
provide enhanced protection against oil oxidation, viscosity 
loss due to shear, and oil aeration as well as protection 
against catalyst poisoning , particulate filter blocking, engine 
wear, piston deposits, degradation of low - and high -
temperature properties, and soot -related viscosity increase. 
API CK -4 oils exceed the performance criteria of API CJ -4, CI -
4 with CI -4 PLUS, CI -4, and CH -4 and can ef fectively lubricate 
engines calling for those API Service Categories. When using 
CK-4 oil with higher than 15 ppm sulfur fuel, consult the 
engine manufacturer for service interval recommendations . CJ-4, CI -4, CI -4 PLUS, CI -4, 
and CH -4  
FA-4 Current  API Se rvice Category FA -4 describes certain XW -30 oils 
specifically formulated for use in select high -speed four -stroke 
cycle diesel engines designed to meet 2017 model year on -
highway greenhouse gas (GHG) emission standards. These 
oils are formulated for use in  on-highway applications with 
diesel fuel sulfur content up to 15 ppm (0.0015% by weight). 
Refer to individual engine manufacturer recommendations 
regarding compatibility with API FA -4 oils. These oils are 
blended to a high temperature high shear (HTHS) vi scosity 
range of 2.9cP –3.2cP to assist in reducing GHG emissions. 
These oils are especially effective at sustaining emission 
control system durability where particulate filters and other 
advanced after  treatment systems are used. API FA -4 oils are 
designed  to provide enhanced protection against oil oxidation, 
viscosity loss due to shear, and oil aeration as well as 
protection against catalyst poisoning, particulate filter 
blocking, engine wear, piston deposits, degradation of low - 
and high -temperature prope rties, and soot -related viscosity 
increase. API FA -4 oils are not interchangeable or backward 
compatible with API CK -4, CJ -4, CI -4 with CI -4 PLUS, CI -4, 
and CH -4 oils. Refer to engine manufacturer 
recommendations to determine if API FA -4 oils are suitable for 
use. API FA -4 oils are not recommended for use with fuels 
having greater than 15 ppm sulfur. For fuels with sulfur 
content greater than 15 ppm, refer to engine manufacturer 
recommendations . Not Backward Compatible  
CJ-4 Current  For high -speed four -stroke cycle diesel engines designed to 
meet 2010 model year on -highway as well as for previous 
model year diesel engines. These oils are formulated for use 
in all applications with diesel fuels ranging in sulfur content up 
to 500 ppm (0.05% by weight). Howev er, the use of these oils 
with greater than 15 ppm (0.0015% by weight) sulfur fuel may 
impact exhaust after treatment system durability and/or drain CI-4 and CI -4 Plus   
8 © UNBS 2018 – All rights reserved  
 interval. CJ -4 oils are especially effective at sustaining 
emission control system durability where particu late filters and 
other advanced after treatment systems are used. Optimum 
protection is provided for control of catalyst poisoning, 
particulate filter blocking, engine wear, piston deposits, low - 
and high -temperature stability, soot handling properties, 
oxidative thickening, foaming, and viscosity loss due to shear. 
API CJ -4 oils exceed the performance criteria of API CI -4 with 
CI-4 
PLUS, CI -4, CH -4, CG -4 and CF -4 and can effectively 
lubricate engines calling for those API Service Categories.  
When using CJ -4 oil with higher than 15 ppm sulfur fuel, 
consult the engine manufacturer for service interval.  
CI-4 Plus  Current  Meets all requirements of CI -4 but includes increased 
resistance to oil thickening from soot and increased shear 
stabili ty. CD, CE, CF -4, CG -4 and 
CH-4 
CI-4 Current  Introduced in 2002. For high -speed, four -stroke engines 
designed to meet 2004 exhaust emission standards 
implemented in 2002. CI -4 oils are formulated to sustain 
engine durability where exhaust gas recirculati on (EGR) is 
used and are intended for use with diesel fuels ranging in 
sulfur content up to 0.5% weight. Can be used in place of CD, 
CE, CF -4, CG -4, and CH -4 oils. Some CI -4 oils may also 
qualify for the CI -4 PLUS designation.  CD, CE, CF -4, CG -4 and 
CH-4 
CH-4 Current  Introduced in 1998. For high -speed, four -stroke engines 
designed to meet 1998 exhaust emission standards.  
CH-4 oils are specifically compounded for use with diesel 
fuels ranging in sulfur content up to 0.5% weight.  CD, CE, CF -4 and CG -4 
CG-4 Obsolete  Introduced in 1995. For severe duty, high -speed, four -stroke 
engines using fuel with less than 0.5% weight sulfur. CG -4 oils 
are required for engines meeting 1994 emission standards.  CD, CE and CF -4 
CF-4 Obsolete  Introduced in 1990. For high -speed, four -stroke, naturally 
aspirated and turbocharged engines.  CD and CE  
CF-2 Obsolete  Introduced in 1994. For severe duty, two -stroke -cycle engines.  CD-II 
Does not necessarily meet 
the requirements of CF or 
CF-4 oils.  
CF Obsolete  Introduced in 1994. Fo r off-road, indirect -injected and other 
diesel engines including those using fuel with over 0.5% 
weight sulfur. Can be used in place of CD oils.  CD 
CE Obsolete  Introduced in 1985. For high -speed, four -stroke, naturally 
aspirated and turbocharged engines.  CC and CD  
CD-II Obsolete  Introduced in 1985. For two -stroke cycle engines.  __ 
CD Obsolete  Introduced in 1955. For certain naturally aspirated and 
turbocharged engines.  __ 
CC  Obsolete  CAUTION:  Not suitable for use in diesel -powered engines 
built aft er 1990.  __ 
CB Obsolete  CAUTION:  Not suitable for use in diesel -powered engines 
built after 1961.  __ 
CA Obsolete  CAUTION:  Not suitable for use in diesel -powered engines 
built after 1959.  __ 
 CDUS 249-1: 2018  
© UNBS  2018  – All rights reserved  9 
 A.2 ACEA Categories  
A.2.1 current spark ignition petrol engi ne and Compression ignition diesel engine 
application  
ACEA A1/B1  Stable, stay -in-grade oil intended for use at extended drain intervals in gasoline engines and car 
& light van diesel engines specifically designed to be capable of using low friction low vis cosity oils with a high 
temperature / high shear rate viscosity of 2.6 mPa*s for xW/20 and 2.9 to 3.5 mPa.s for all other viscosity 
grades. These oils are unsuitable for use in some engines. Consult owner manual or handbook if in doubt.  
ACEA A3/B3  Stable, stay-in-grade oil intended for use in high performance gasoline engines and car & light 
van diesel engines and/or for extended drain intervals where specified by the engine manufacturer, and/or for 
year-round use of low viscosity oils, and/or for severe op erating conditions as defined by the engine 
manufacturer.  
ACEA A3/B4  Stable, stay -in-grade oil intended for use in high performance gasoline and direct injection 
diesel engines, but also suitable for applications described under A3/B3.  
ACEA A5/B5  Stable, s tay-in-grade oil intended for use at extended drain intervals in high performance 
gasoline engines and car & light van diesel engines designed to be capable of using low friction low viscosity 
oils with a High temperature / High shear rate (HTHS) viscosity  of 2.9 to 3.5 mPa.s. These oils are unsuitable 
for use in some engines. Consult owner manual or handbook if in doubt.  
A.2.2 Catalyst compatibility oils  
C1 Stable, stay -in-grade oil intended for use as catalyst compatible oil in vehicles with DPF and TWC i n high 
performance car and light van diesel and gasoline engines requiring low friction, low viscosity, low SAPS oils 
with a minimum HTHS viscosity of 2.9 mPa.s. These oils will increase the DPF and TWC life and maintain the 
vehicles fuel economy. Warning:  these oils have the lowest SAPS limits and are unsuitable for use in some 
engines. Consult owner manual or handbook if in doubt .  
C2 Stable, stay -in-grade oil intended for use as catalyst compatible oil in vehicles with DPF and TWC in high 
performance car  and light van diesel and gasoline engines designed to be capable of using low friction, low 
viscosity oils with a minimum HTHS viscosity of 2.9mPa.s. These oils will increase the DPF and TWC life and 
maintain the vehicles fuel economy.  
C3 Stable, stay -in-grade oil intended for use as catalyst compatible oil in vehicles with DPF and TWC in high 
performance car and light van diesel and gasoline engines, with a minimum HTHS viscosity of 3.5mPa.s. 
These oils will increase the DPF and TWC life.  
C4 Stable, stay -in-grade oil intended for use as catalyst compatible oil in  vehicles  with DPF and TWC in high 
performance car and light van diesel and gasoline en gines requiring low SAPS oil with a minimum HTHS 
viscosity of 3.5mPa.s. These oils will increase the DPF and TWC life.  
C5 Stable, stay -in-grade Engine Oil with Mid SAPS -Level, for further improved Fuel Economy, intended for 
use as catalyst compatible Oil a t extended Drain Intervals in Vehicles with all Types of modern After treatment 
Systems and High Performance Passenger Car & Light Duty Van Gasoline & DI Diesel Engines that are 
designed to be capable and OEM -approved for use of Low Viscosity Oils with a m inimum HTHS Viscosity of 
2.6 mPa*s.  
A.2.3 Heavy Duty Diesel engine oils  
E4 Stable, stay -in-grade oil providing excellent control of piston cleanliness, wear, soot handling and lubricant 
stability. It is recommended for highly rated diesel engines meeting E uro I, Euro II, Euro III, Euro IV and Euro 
V emission requirements and running under very severe conditions, e.g. significantly extended oil drain 
intervals according to the manufacturer's recommendations. It is suitable for engines without particulate fil ters, 
and for some EGR engines and some engines fitted with SCR NOx reduction systems. However,  
10 © UNBS 2018 – All rights reserved  
 recommendations may differ between engine manufacturers so Driver Manuals and/or  Dealers  shall be 
consulted if in doubt.  
E6 Stable, stay -in-grade oil providing excellent control of piston cleanliness, wear, soot handling and lubricant 
stability. It is recommended for highly rated diesel engines meeting Euro I, Euro II, Euro III, Euro IV, Euro V 
and Euro VI emission requirements and running under very severe conditions, e.g. significantly extended oil 
drain intervals according to the manufacturer's recommendations. It is suitable for EGR engines, with or 
without particulate filters, and for engines fitted with SCR NOx reduction systems. E6 quality is strongly 
recommended for engines fitted with particulate filters and is designed for use in combination with low sulphur 
diesel fuel. However, recommendations may differ between engine manufacturers so D river Manuals and/or  
Dealers  shall be consulted if in doubt.  
E7 Stable, stay -in-grade oil providing effective control with respect to piston clean liness and bore polishing. It 
further provides excellent wear control, soot handling and lubricant stability. It is recommended for highly rated 
diesel engines meeting Euro I, Euro II, Euro III, Euro IV and Euro V emission requirements and running under 
severe conditions, e.g. extended oil drain intervals according to the manufacturer's recommendations. It is 
suitable for engines without particulate filters, and for most EGR engines and most engines fitted with SCR 
NOx reduction systems. However, recommenda tions may differ between engine manufacturers so Driver 
Manuals and/or Dealers shall be consulted if in doubt.  
E9 Stable, stay -in-grade oil providing effective control with respect to piston cleanliness and bore polishing. It 
further provides excellent wea r control, soot handling and lubricant stability. It is recommended for highly rated 
diesel engines meeting Euro I, Euro II, Euro III, Euro IV, Euro V and Euro VI emission requirements and 
running under severe conditions, e.g. extended oil drain intervals according to the manufacturer's 
recommendations. It is suitable for engines with or without particulate filters, and for most EGR engines and 
for most engines fitted with SCR NOx reduction systems. E9 is strongly recommended for engines fitted with 
particu late filters and is designed for use in combination with low sulphur diesel fuel. However, 
recommendations may differ between engine manufacturers so Drivers Manuals and/or Dealers should be 
consulted if in doubt  
A.3 Engine oil Categories for two-stroke cy cle motorcycle gasoline engine 
applications  
A.3.1 JASO Specifications  
Table A. 3 — showing JASO categories for two -stroke  cycle  gasoline application engine o il 
Category  status  Service  
 FA abolished  Original spec established regulating lubricity, detergency , initial 
torque, exhaust smoke and exhaust system blocking  
 FB 
 Current  Increased lubricity, detergency, exhaust smoke and exhaust system 
blocking requirements over FA.  
 FC Current  Lubricity and initial torque requirements same as FB, however far 
higher  detergency, exhaust smoke and exhaust system blocking 
requirements over FB.  
 FD current  Same as FC with far higher detergency requirement.  
 
A.3.2 ISO Specifications  
The performance of two -stroke oils is classified into three grades, as indicated in Tabl e A 4, based on the six 
performance indices derived from four engine tests from lower to higher performance  CDUS 249-1: 2018  
© UNBS  2018  – All rights reserved  11 
 Table A .4 — showing current and ISO categories for two -stroke spark ignition application e ngin e oil 
Category  status  service  
ISO-L-EGB  
 Current  Same  requirements as JASO FB + 
test for piston cleanliness  
ISO-L-EGC  
 Current  Same requirements as JASO FC + 
test for piston cleanliness.  
ISO-L-EGD  
 Current  Same requirements as JASO FD + 
test for piston cleanliness + 
detergent effect.  
 
 
A.3.3 API Specifica tions  
For two -stroke motorcycle gasoline engine, the latest API service category includes performance properties of 
each earlier category and can be used to service older engines where earlier category oils are recommended  
Table A. 5 — showing current and o bsolete API categories for 2 str oke Spark Ignition application 
engine o il 
Spec  Status  Description  
TA Obsolete  Proposed classification for two -stroke engine oils required for extremely -small engines, typically less 
than 50 cc. Engine Tests for this classif ication were under preparation when the Coordinating 
European Council (CEC) withdrew support for this category.  
TB Obsolete  Proposed classification for two -stroke engine oils required for the engines of motor -scooters and other 
highly -loaded small engines , typically between 50 and 200 cc. The test sponsor no longer requires this 
category, and the classification has been abandoned.  
TC Current  Designed for various high -performance engines, typically between 200 and 500 cc, such as those on 
motorcycles and s nowmobiles, and chain saws with high fuel -oil ratios - but not outboards. Two -cycle 
engine oils designed for API Classification TC address ring -sticking, pre -ignition and cylinder scuffing 
problems.  
TD Obsolete  Designed for water -cooled outboard engines,  this classification used the identical engine test to that in 
the National Marine Manufacturers association (NMMA) TC -W category. API TD has been 
superseded, and is no longer accepted by the NMMA, who now recommend oils meeting the 
requirements of TC -W3 f or water -cooled outboard engines.  
  
12 © UNBS 2018 – All rights reserved  
 Bibliography  
[1] ACEA European Oil Sequences, 2012  
[2] ASTM D4485 Standard Specification for Performance of Engine Oils  
[3] JASO T 903:2011 Motorcycles―four -Stroke Cycle Gasoline Engine Oils.  
[4] SAE 3J00 _201501 0. Engine Oil Viscosity Classification  
[5] US 249:2000/ EAS 159, Specification for engine oil  
[6] US ISO 6743 -15, Lubricants, industrial oils and related products (class L) — Classification — Part 15: 
Family E (Internal combustion engine oils)  
[7] US ISO 13738, Lubricants, industrial Oils and related products (Class L) — Classification - Part 15: 
Family E (Internal Combustion engine Oils) — Specification for two - stroke cycle gasoline engine oils 
(Categories EGB, EGC & EGC)  
 CDUS 249-1: 2018  
© UNBS  2018  – All rights reserved  13 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS C ertification Mark is governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the certification mark scheme operated by 
the Uganda National Bureau of Standards and in conjunction with the releva nt Uganda Standard. The 
presence of this mark on a product or in relation to a product is an assurance that the goods comply with the 
requirements of that standard under a system of supervision, control and testing in accordance with the 
certification mark  scheme of the Uganda National Bureau of Standards. UNBS marked products are 
continually checked by UNBS for conformity to that standard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Burea u of Standards.  
 
 CDUS 249-1: 2018    
 
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