A fuel composition comprising a major amount of hydrocarbons boiling in the gasoline or diesel range and an effective detergent amount of an alkyl-substituted, five- or six-membered cyclic urea-substituted monoamine or diamine which is the reaction product of: PA1 (a) a halogenated aliphatic hydrocarbon derived from a branched-chain polyolefin having an average molecular weight of about 400 to 5000; PA1 (b) a polyamine having from 3 to 4 amine nitrogen atoms and from 4 to 9 carbon atoms; and thereafter PA1 (c) urea.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
In recent years, numerous fuel detergents or "deposit control" additives 
have been developed. These materials when added to hydrocarbon fuels 
employed in internal combustion engines effectively reduce deposit 
formation which ordinarily occurs in carburetor ports, throttle bodies, 
ventures, intake ports and intake valves. The reduction of these deposit 
levels has resulted in increased engine efficiency and a reduction in the 
level of hydrocarbon and carbon monoxide emissions. 
Furthermore, as engines age, they suffer from a need for a higher octane 
base gasoline. It is desirable to produce an additive for gasoline which 
is not only an effective deposit control additive but also has a low ORI 
(octane requirement increase ) property. 
It is, therefore, highly desirable to provide fuel compositions which 
contain deposit control additives which effectively control deposits in 
intake systems (carburetor, valves, etc.) of engines operated with fuels 
containing them and, most preferably, have a low ORI effect. 
2. Description of the Prior Art 
U.S. Pat. Nos. 3,438,757 and 3,574,576 to Honnen et al. disclose high 
molecular weight branched-chain aliphatic hydrocarbon N-substituted amines 
and alkylene polyamines which are useful as detergents and dispersants in 
hydrocarbonaceous liquid fuels for internal combustion engines. These 
hydrocarbyl amines and polyamines have molecular weights in the range of 
about 425 to 10,000, and more usually in the range of about 450 to 5000. 
Such high molecular weight hydrocarbyl polyamines are also taught to be 
useful as lubricating oil additives in U.S. Pat. No. 3,565,804 to Honnen 
et al. 
U.S. Pat. Nos. 3,898,056 and 3,960,515 to Honnen et al. disclose a mixture 
of high and low molecular weight hydrocarbyl amines used as detergents and 
dispersants at low concentrations in fuels. The high molecular weight 
hydrocarbyl amine contains at least one hydrocarbyl group having a 
molecular weight from about 1900 to 5000 and the low molecular weight 
hydrocarbyl amine contains at least one hydrocarbyl group having a 
molecular weight from about 300 to 600. The weight ratio of low molecular 
weight amine to high molecular weight amine in the mixture is maintained 
between about 0.5:1 and 5:1. 
U.S. Pat. Nos. 4,123,232 and 4,108,613 to Frost disclose pour point 
depressants for hydrocarbonaceous fuels which are the reaction products of 
an epoxidized alpha olefin containing from 14 to 30 carbon atoms and a 
nitrogen-containing compound selected from an amine, a polyamine and a 
hydroxyalkyl amine. 
U.S. Pat. No. 3,794,586 to Kimura et al. discloses lubricating oil 
compositions containing a detergent and anti-oxidant additive which is a 
hydroxyalkyl-substituted polyamine prepared by reacting a polyolefin 
epoxide derived from branched-chain olefins having an average molecular 
weight of 140 to 3000 with a polyamine selected from alkylene diamines, 
cycloalkylene diamines, aralkylene diamines, polyalkylene polyamines and 
aromatic diamines, at a temperature of 15.degree. C. to 180.degree. C. 
U.S. Pat. No. 3,380,909 to Lee describes the reaction: 
##STR1## 
This polyaminourea is reacted with an alkylsuccinimide to make an 
anti-foulant additive. 
The same or similar chemistry is shown in U.S. Pat. Nos. 3,491,025 and 
3,556,995 also to Lee and the products are taught as useful as 
detergents-dispersants in lube oils. 
U.S. Pat. No. 3,965,084 to Sidney Schiff entitled "Ashless Dispersant 
Products and Process" relates to improved additives for lubricants and 
motor fuels which are prepared by reacting a petroleum sulfonic acid with 
an adduct formed from an amine and either urea or thiourea (see Col. 1, 
lines 7 et seq.). A wide variety of amines can be used to form the adduct 
(see Col. 5, lines 14 to 36), but there is no hydroxyl group on Schiff's 
adduct. The preferred mole ratio of amine to urea or thiourea is 1.5:1 to 
2.25:1 (see Col. 5, lines 38-41). Runs 2 and 3, summarized in Table 1 in 
Col. 7, show the reaction of tetraethylene pentamine (TEPA) (which is 
outside the definition of useful amines for the subject invention) with 
urea and footnote "a" of Table 1 shows that Schiff expected the product 
to be a dimer. There is no teaching in Schiff that a cyclic urea would be 
formed. One with ordinary skill in the art would expect (from the 
teachings of Schiff in Table 1 and in the preferred ratios of amine to 
urea) the formation of a dimer-like product. 
SUMMARY OF THE INVENTION 
A fuel composition is provided which contains a deposit control additive 
which aids the composition in maintaining cleanliness of engine intake 
systems and has a low ORI factor. Accordingly, the novel fuel composition 
of the invention comprises a major amount of hydrocarbons boiling in the 
gasoline or diesel range and an effective detergent amount of an 
alkyl-substituted, five- or six-membered cyclic urea-substituted monoamine 
or diamine. These substituted monoamines or diamines are the reaction 
products of (a) a branched-chain aliphatic hydrocarbon halide having an 
average molecular weight of about 400 to 5000; (b) a polyamine having from 
3 to about 4 amine nitrogen atoms and from 4 to 9 carbon atoms; and (c) 
urea. The cyclic urea-substituted monoamines or diamines are also new 
compositions per se. 
The present invention further provides a fuel concentrate comprising an 
inert stable oleophilic organic solvent boiling in the range of from about 
150.degree. F. to 400.degree. F. and from 10 to 50 weight percent of the 
alkyl-substituted, five- or six-membered cyclic urea-substituted monoamine 
or diamine reaction product described above. 
DETAILED DESCRIPTION OF THE INVENTION 
The alkyl-substituted, five- or six-membered cyclic urea-substituted 
monoamine or diamine additive employed in the fuel composition of the 
present invention comprises the reaction product of (a) a high molecular 
weight branched-chain aliphatic hydrocarbon halide having an average 
molecular weight of about 400 to 5000; (b) a polyamine having from 3 to 4 
amine nitrogen atoms and from 4 to 9 carbon atoms; and (c) urea. The 
polyamine component of this reaction product is selected to provide 
deposit control activity with low octane requirement increase. 
The High Molecular Weight Branched-Chain Aliphatic Hydrocarbon Halide 
Component 
The high molecular weight branched-chain aliphatic hydrocarbon halide may 
have a variety of structures and may be aliphatic or alicyclic, and is 
generally free of aromatic unsaturation. Preferably the aliphatic 
hydrocarbon halide is derived from a high molecular weight branched-chain 
polyolefin having an average molecular weight of about 400 to 5000, 
preferably from about 900 to 2500. By "halide" in the application is meant 
chloride or bromide. 
Such high molecular weight branched-chain polyolefins are generally 
mixtures of molecules having different molecular weights and can have at 
least one branch per 6 carbon atoms along the chain, preferably at least 
one branch per 4 carbon atoms along the chain, and particularly preferred 
are those having about one branch per 2 carbon atoms along the chain. 
These branched-chain olefins may conveniently comprise polyolefins 
prepared by the polymerization of olefins of from 2 to 6 carbon atoms, and 
preferably from olefins of from 3 to 4 carbon atoms, and more preferably 
from propylene or isobutylene. When ethylene is employed, it must be 
copolymerized with another olefin so as to provide a branched-chain 
polyolefin. The addition-polymerizable olefins employed are normally 
1-olefins. The branch may be of from 1 to 4 carbon atoms, more usually of 
from 1 to 2 carbon atoms, and preferably methyl. 
In general, any high molecular weight branched-chain polyolefin isomer 
capable of forming a halide and then reacting with a polyamine is suitable 
for use in preparing the presently employed fuel additives. 
Alternatively, various naturally occurring materials may be used which have 
the desired molecular weight and aliphatic or alicyclic character. These 
aliphatic hydrocarbons are converted to an aliphatic hydrocarbon halide 
which then is reacted with the desired amine in the proper mole 
proportions. The halide is prepared from the hydrocarbon by halogenation: 
ionically or free radically. 
The halogen may be introduced into the hydrocarbon molecule by various 
means known in the art. Most readily, either chlorine or bromine (halogen 
of atomic numbers 17 and 35, respectively) may be introduced by the free 
radical catalyzed halogenation of the hydrocarbon, or ionic addition to 
olefinic unsaturation. Various free radical catalysts may be used, such as 
peroxides, azo compounds, bromine, iodine, as well as light. Ionic 
catalysts are exemplified by ferric chloride. Methods of halogenation are 
well known in the art and do not require extensive exemplification or 
illustration here. 
The amount of halogen introduced will depend on the particular hydrocarbon 
used, the desired amount of amine to be introduced into the molecule, the 
particular alkylene amine used, and the halogen used. The amount of 
halogen introduced will generally be in the range from about 1 to 5 
halogen atoms per molecule, depending on the reactivity of the resulting 
halide. On a weight percent basis, the amount of halide will generally 
range from about 1 to 25, more usually from about 1 to 10 weight percent 
of the branched-chain aliphatic hydrocarbon halide. 
Amine Component 
The amine component used to prepare the presently employed 
alkyl-substituted monoamine and diamine reaction products are derived from 
a polyamine having from 3 to 4 amine nitrogen atoms and from 4 to about 9 
carbon atoms. The polyamine is reacted with the branched-chain aliphatic 
hydrocarbon halide to produce the alkyl-substituted polyamine portion of 
the fuel additive finding use within the scope of the present invention. 
The polyamine provides a reaction product; i.e., after reaction of the 
polyamine with urea, with at least one basic nitrogen atom per product 
molecule; i.e., a nitrogen atom titratable by a strong acid. 
The preferred polyamines finding use within the scope of the present 
invention are those having the formula: 
EQU NH.sub.2 --Y--NH--X--NH.sub.2 
where X and Y can be the same or different and are selected from the group 
consisting of --CH.sub.2 CH.sub.2 --; --CH.sub.2 CH.sub.2 CH.sub.2 --; and 
##STR2## 
Examples of suitable polyamines include but are not limited to: 
(1) diethylenetriamine 
(H.sub.2 N--CH.sub.2 CH.sub.2 --NH--CH.sub.2 CH.sub.2 --NH.sub.2) (DETA) 
(2) di(1,3-propylene)triamine 
(H.sub.2 N--CH.sub.2 CH.sub.2 CH.sub.2 --NH--CH.sub.2 CH.sub.2 CH.sub.2 
--NH.sub.2) 
(3) di(1,2-propylene)triamine 
##STR3## 
(4) triethylenetetraamine [H.sub.2 N--CH.sub.2 CH.sub.2 --NH--CH.sub.2 
CH.sub.2 --NH--CH.sub.2 CH.sub.2 --NH.sub.2 ] (TETA) 
(5) tri(1,3-propylene)tetraamine 
[H.sub.2 N(CH.sub.2).sub.3 NH(CH.sub.2).sub.3 NH(CH.sub.2).sub.3 NH.sub.2 ] 
(TPTA) 
The halohydrocarbon and alkylene polyamine or polyalkylene polyamine may be 
brought together neat or in the presence of an inert solvent, particularly 
a hydrocarbon solvent. The inert hydrocarbon solvent may be aliphatic or 
aromatic. Also, aliphatic alcohols capable of dissolving the reactants may 
be used by themselves or in combination with another solvent. 
The reaction may be carried out at room temperature (20.degree. C.), but 
elevated temperatures are preferred. Usually, the temperature will be in 
the range of from about 100.degree. C. to 225.degree. C. Depending on the 
temperature of the reaction, the particular halogen used, the mole ratios 
and the particular amine, as well as the reactant concentrations, the time 
may vary from 1 to 24 hours, more usually from about 3 to 20 hours. Times 
greatly in excess of 24 hours do not particularly enhance the yield and 
may lead to undesirable degradation. It is therefore preferred to limit 
the reaction time to fewer than 24 hours. 
The mole ratio of alkylene amine to halohydrocarbon will generally be in 
the range from about 0.2 to 10 moles of alkylene amine per mole of 
halohydrocarbon, more usually 0.5 to 5 moles of alkylene amine per mole of 
halohydrocarbon. The mole ratio will depend upon the amount of halogen 
present in the halohydrocarbon, the particular halogen and the desired 
ratio of amine to hydrocarbon . If complete suppression of 
polysubstitution of the alkylene polyamines is desired, then large mole 
excesses of the amine will be used. Thus, the most preferred mole ratio of 
alkylene amine to halohydrocarbon is in excess of 1:1; generally 3:1 to 
5:1. 
Small amounts of residual halogen in the final composition are not 
deleterious. Generally, the residual halogen as bound halogen will be in 
the range of perhaps 100 ppm to 2 to 5 weight percent of the composition. 
Generally, the branched-chain aliphatic portion of the hydrocarbon halide 
hydrocarbons will have an olefinic double bond. In particular instances, 
the amines may react in a way resulting in the elimination of hydrogen 
halide, introducing further aliphatic unsaturation into the hydrocarbon 
radical. Therefore, the hydrocarbon radicals usually will be olefinically 
unsaturated. However, the olefinic unsaturation does not significantly 
affect the utility of the product, and when available, saturated aliphatic 
halide may be used. 
After the reaction has been carried out for a sufficient length of time, 
the reaction mixture may be extracted with a hydrocarbon medium to free 
the product from any low molecular weight amine salt which has formed. The 
product may then be isolated by evaporation of the solvent. Further 
separation from unreacted hydrocarbon or purification may be carried out 
as desired, e.g., by chromatography. 
Depending on the particular application of the composition of this 
invention, the reaction may be carried out in the medium in which it will 
ultimately find use and be formed at concentrations which provide a 
concentrate of the detergent composition. Thus, the final reaction mixture 
may be in a form to be used directly upon dilution in fuels. 
Urea Component 
The third component used in the preparation of the new substituted 
polyamines of this invention is urea 
##STR4## 
As will be described more fully below, the alkyl-substituted five- or 
six-membered cyclic urea-substituted monoamines and diamines are prepared 
by reacting the described halogenated aliphatic hydrocarbon with the 
defined polyamine and this product is then reacted with urea to form the 
new cyclic urea compositions of this invention. 
The preferred new cyclic ureas are selected from the monoamines and 
diamines having the formula: 
##STR5## 
where polyalkenyl is a branched-chain polyolefin having an average 
molecular weight from 400 to 5000; preferably from 900 to about 2500 and 
wherein the olefin has from 2 to 6 carbon atoms, preferably 3 to 4 carbon 
atoms, and more preferably is propylene or isobutylene; 
x is the integer 1 or 2; and 
Z is the same or different and is selected from the group consisting of 
--CH.sub.2 CH.sub.2 --; --CH.sub.2 CH.sub.2 CH.sub.2 --; and 
##STR6## 
The above formula is an alkyl-substituted five- or six-membered cyclic 
urea-substituted monoamine when x is 1 or a substituted diamine when x is 
2. 
Surprisingly, the reaction of the alkyl-substituted monoamine or diamine 
with urea results in the production of a cyclic urea plus two moles of 
free ammonia. From the prior art to Lee and Schiff, discussed above, it 
was expected that a linear dimer of urea would form. 
These new cyclic ureas were then found to have surprisingly good detergent 
and ORI properties as will be shown below. 
Preparation Of The Alkyl-Substituted Five- Or Six-Membered Cyclic 
Urea-Substituted Monoamine Or Diamine Polyamine Reaction Product 
As noted above, the fuel additive finding use in the present invention is 
an alkyl-substituted, five- or six-membered cyclic urea-substituted 
monoamine or diamine which is the reaction product of (a) a halogenated 
high molecular weight branched-chain aliphatic hydrocarbon, preferably a 
polyolefin having an average molecular weight of about 400 to 5000; (b) a 
polyamine having from 3 to 4 amine nitrogen atoms and from 4 to 9 carbon 
atoms; and (c) urea. 
The reaction of (a) with (b) was described above. 
The alkyl-substituted polyamine is then reacted with urea and can be 
represented as follows: 
##STR7## 
where polyalkenyl is as defined above. 
The reaction of the alkyl-substituted polyamine with the urea is usually 
carried out either neat or with a solvent at a temperature in the range of 
75.degree. C. to 250.degree. C., preferably 140.degree. C. to 180.degree. 
C. The reaction is usually conducted in the absence of oxygen and may be 
carried out in the presence or absence of a catalyst. The desired product 
is recovered by sparging with nitrogen or applying a vacuum to remove 
traces of ammonia. Alternatively a water wash could be used. 
The mole ratio of the urea to the alkyl-substituted polyamine is usually 
about 1:1, but higher or lower ratios can be used. The preferred ratios 
are 0.8:1 to 1.2:1. The reaction time is usually from 0.5 to 20 hours and 
more usually from 1 to 8 hours. These reaction variables are not critical 
and are well within the skill of those in the art. 
Ammonia is a gaseous by-product and is usually removed during reaction to 
drive the reaction to the desired product. The ammonia is removed and 
treated in known ways. 
The reaction solvents, if employed, should be stable and inert to the 
reactants and products. Preferred solvents include aliphatic or aromatic 
hydrocarbons or aliphatic alcohols. 
Fuel Compositions 
The alkyl-substituted, five- or six-membered cyclic urea-substituted 
monoamine or diamine is useful as an additive for a hydrocarbon distillate 
fuel. The proper concentration of additive necessary in order to achieve 
the desired detergency and dispersancy varies depending upon the type of 
fuel employed, the presence of other detergents, dispersants and other 
additives, etc. Generally, however, from 30 to 2000 weight ppm, preferably 
from 100 to 500 ppm of alkyl-substituted monoamine or diamine additives of 
the invention per part of base fuel is needed to achieve the best results. 
When other detergents are present, a lesser amount of additive may be 
used. For performance as a carburetor detergent only, lower 
concentrations, for example, 30 to 70 ppm may be preferred. 
The deposit control additive may be formulated as a concentrate, using an 
inert stable oleophilic organic solvent boiling in the range of about 
150.degree. to 400.degree. F. Preferably, an aliphatic or an aromatic 
hydrocarbon solvent is used, such as benzene, toluene, xylene or 
higher-boiling aromatics or aromatic thinners. Aliphatic alcohols of about 
3 to 8 carbon atoms, such as isopropanol, isobutylcarbinol, n-butanol and 
the like, in combination with hydrocarbon solvents are also suitable for 
use with the detergent-dispersant additive. In the concentrate, the amount 
of the additive will be ordinarily at least 10% by weight and generally 
not exceed 70% by weight, preferably 10-50 weight percent and most 
preferably from 10 to 25 weight percent. 
In gasoline fuels, other fuel additives may also be included such as 
antiknock agents, e.g., methylcyclopentadienyl manganese tricarbonyl, 
tetramethyl or tetraethyl lead, or other dispersants or detergents such as 
various substituted succinimides, amines, etc. Also included may be lead 
scavengers such as aryl halides, e.g., dichlorobenzene or alkyl halides, 
e.g., ethylene dibromide. Additionally, antioxidants, metal deactivators 
and demulsifiers may be present. 
A particularly useful additive is a fuel-soluble nonvolatile carrier oil. 
The carrier fluid employed in this invention is a chemically inert 
hydrocarbon-soluble liquid vehicle which substantially increases the 
nonvolatile residue (NVR), or solvent-free liquid fraction of the fuel 
additive composition while not overwhelmingly contributing to octane 
requirement increase. The carrier fluid may be a natural or synthetic oil, 
such as mineral oil, refined petroleum oils, synthetic polyalkanes and 
alkenes, synthetic polyoxyalkylene derived oils, and the like, as 
described, for example, in U.S. Pat. No. 4,191,537 to Lewis. These carrier 
fluids are believed to act as a carrier for the dispersant and detergent 
and to assist in removing and retarding deposits. 
The carrier fluid employed in the instant invention must also be capable of 
forming a homogeneous mixture with the other components of the present 
fuel additive composition. Examples of suitable carrier fluids include 
Chevron Neutral Oil 500R and Chevron Neutral Oil 600P, available from 
Chevron U.S.A. Inc., San Francisco, Calif. 
Exemplary carrier oils include nonvolatile poly(oxyalkylene) compounds; 
other synthetic lubricants, i.e., polyalphaolefins or a lubricating 
mineral oil. The carrier oils are employed in amounts from 100 to 5000 ppm 
by weight of the fuel, preferably from 500 to 3000 ppm of the fuel. The 
polyalphaolefins can suitably be those having a viscosity at 100.degree. 
C. of from 2 to 20 centistokes as more fully described in U.S. Pat. No. 
4,846,848 issued Jul. 11, 1989 to R. Miles et al., the description of 
which is incorporated herein by reference.

EXAMPLES 
The following examples are presented to illustrate specific embodiments of 
the practice of this invention and should not be interpreted as 
limitations upon the scope of the invention. 
Example 1 
Chlorination Of Polyisobutylene 
A one-liter flask was charged with 400 grams Parapol 1300.TM. mole weight 
percent polyisobutylene, purchased from the Paramins of Exxon Chemical 
Company. The temperature was raised to 90.degree. C. and chlorine was 
bubbled in slowly for three hours while maintaining the temperature 
between 90.degree. C. and 100.degree. C. The reaction mixture was 
thoroughly sparged with nitrogen to remove hydrogen chloride. Analysis 
indicated the product contained 2.06 weight percent chlorine. 
Example 2 
Reaction Of Polyisobutenylchloride With Diethylenetriamine (DETA) 
A one-liter flask was charged with 302 grams of polyisobutenylchloride from 
Example 1 and 160 ml diethylenetriamine. The mixture was heated with 
stirring at 200.degree. C. under a nitrogen atmosphere for 18 hours. The 
product was cooled to room temperature and dissolved in 800 ml of toluene. 
The solution was washed twice with 400 ml portions of water/isopropanol 
(3/1) to remove excess DETA. The solvent (toluene) was removed under 
vacuum to give 322 grams of product containing 2.45 weight percent 
nitrogen. 
Example 3 
Reaction Of Polyisobutenylpolyamine Of Example 2 With Urea 
In a 500-ml flask, 201 grams polyisobutenyldiethylenetriamine from Example 
2 was mixed with 7 grams of urea and heated to 170.degree. C.-180.degree. 
C. under a stream of nitrogen to continuously remove by-product ammonia 
for nine hours with stirring. Vacuum was applied briefly at the end of the 
reaction to remove any traces of ammonia. The product contained 0.85 
weight percent basic nitrogen. Infrared spectroscopy showed a strong 
absorption at 1702 cm.sup.-1 indicative of the cyclic urea. The product of 
2 moles of the product of Example 2 with urea would have had an infrared 
spectroscopy absorption at about 1643 cm.sup.-1 but no absorption at 1643 
cm.sup.-1 was observed. 
Intake Valve Deposit Control Evaluation 
A test was performed wherein the alkyl-substituted, cyclic urea-substituted 
amine of Example 3 was blended in gasoline and the deposit control 
capacity tested in an ASTM/CFR Single-Cylinder Engine Test. 
In carrying out the test, a Waukesha CFR single-cylinder engine was used, 
labelled "12B" in Table 1 below. The run was carried out for 15 hours, at 
the end of which time the intake valve is removed, washed with hexane and 
weighed. The previously determined weight of the clean valve is subtracted 
from the weight of the valve. The difference between the two weights is 
the weight of the deposit with a lesser amount of deposit measured 
connoting a superior additive. The operating conditions of the test are as 
follows: water jacket temperature 100.degree. C. (212.degree. F.); 
manifold vacuum of 12 in. Hg; intake mixture temperature 50.2.degree. C. 
(125.degree. F.); air-fuel ratio of 12; ignition spark timing of 
40.degree.BTC; engine speed is 1800 rpm; the crankcase oil is a commercial 
30 W oil. The amount of carbonaceous deposit in milligrams on the intake 
valves is measured and reported in the following Table 1. 
The base fuel tested in the above test is a regular octane unleaded 
gasoline containing no fuel deposit control additive. The base fuel is 
admixed with the additive of Example 3 at 200 ppma (parts per million of 
actives). Also presented in Table 1 for comparison purposes are values for 
(i) a commercially available polybutene amine deposit control additive and 
(ii) a commercially available polyether amine deposit control additive, 
each having recognized performance in the field. 
TABLE 1 
______________________________________ 
EX. ADDI- PPM CCD.sup.5, 
NO. TIVE PPMA.sup.6 
500R.sup.7 
SITV.sup.1, mg 
ORI gm 
______________________________________ 
4 None -- -- 253.1 1.8 1.16 
5 CA1.sup.2 
200 800 0.84; 1.4 
5.2; 5.1 
2.09; 2.27 
6 CA2.sup.3 
200 -- 20.3; 16.1 
3.1; 3.1 
1.39; 1.40 
7 Ex. 3 .sup. 200.sup.4 
-- 14.5; 11.9 
4.6 1.89 
______________________________________ 
.sup.1 SCITV = Single Cylinder Intake Valve. 
.sup.2 CA1 = Commercial Additive 1 (a polybutene amine). 
.sup.3 CA2 = Commercial 2 (a polyether amine). 
.sup.4 More than one number indicates more than one test. 
.sup.5 CCD = Combustion Chamber Deposits. 
.sup.6 PPMA = Parts per million actives. 
.sup.7 500R = A mineral oil carrier oil available from Chevron U.S.A. 
Chevron Neutral Oil 500R is a highly refined based oil having a pour poin 
of -12.degree. C. (Max.) and a viscosity of 98.6 cSt at 40.degree. C. 
Comparing Example 7 in Table 1 with Examples 4 through 6 shows that the 
additive of this invention results in a substantial decrease in SCITV 
deposits over the base gasoline (Example 4) and is comparable with 
commercially available deposit control additives (compare Example 7 with 
Examples 5 and 6). 
Again, comparing the ORI performance of the additives of this invention 
(Example 7) with the base fuel (Example 4) and commercially available 
additives (Examples 5 and 6), shows the additives of this invention give 
results which are comparable to the commercial additives.