PART 13

INCORPORATED TEST PROCEDURES

Large Spark-Ignition Engines

(2010 and Later Model Years; Part 1048)

Note: This appendix shows the entirety of regulatory amendments to the test 

procedures titled below, which were approved by the Air Resources Board on 

December 16, 2011, and refined via subsequent conforming modifications 

authorized under Resolution 11-41. These amendments are formatted in a 

style to indicate changes from the existing test procedures. All existing 

language is indicated by plain type. All additions to the existing language are 

indicated by underlined type. All deletions to the existing language are 

indicated by strikeout. Only those sections containing the modifications from 

the existing language are included. All other portions remain unchanged and 

are indicated by the notation [ * * * * * ] for reference. If there is any conflict 

between the provisions of this document and the California Health and Safety 

Code, Division 26, or Title 13 of the California Code of Regulations (CCR), the 

Health and Safety Code and Title 13 apply.
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State of California

AIR RESOURCES BOARD

CALIFORNIA EXHAUST AND EVAPORATIVE EMISSION STANDARDS

AND TEST PROCEDURES FOR NEW 2010 AND LATER

OFF-ROAD LARGE SPARK-IGNITION ENGINES

(2010 and Later Test Procedure 1048)

Adopted: March 2, 2007

Amended: November 21, 2008

Amended: October 25, 2012
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PART 1048 – CONTROL OF EMISSIONS FROM NEW, LARGE NONROAD 

SPARK-IGNITION ENGINES

* * * * *

Subpart B—Emission Standards and Related Requirements

§1048.101 What exhaust emission standards must my engines meet?\

* * * * *

(e) Fuel tTypes and Test Fuel.

(1) Fuel tTypes

* * * * *

(2) Test Fuel.

(A) Except as outlined in (B), Iif the engine is a gasoline-fueled large spark-ignition 

engine, then the test fuel used shall be consistent with the fuel specifications as outlined 

in the "California Exhaust Emission Standards and Test Procedures for 2001 and 

Subsequent Model Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles," as 

of January 1, 2006 (last amended August 4, 2005) incorporated by reference in Section 

1961(d), Title 13, CCR). The California fuel specifications are contained in the 

California Code of Regulations, Title 13, Chapter 5, Article 1, Sections 2260-2272. If 

the engine is tested using the U.S. EPA test fuel, consistent with the fuel specifications 

as outlined in Title 40 Code of Federal Register, Part 1065, subpart H, the manufacturer 

shall demonstrate that the emission test results complies with these Test Procedures.

(B) For 2013-2019 model-year gasoline-fueled, large spark-ignition engines, the 

manufacturer has the option to use the fuel specified in (e)(2)(C).

(C) For 2020 and later gasoline-fueled, large spark-ignition engines: The certification 

test fuel for exhaust emission testing must be consistent with the fuel specifications as 

outlined in title 13, section 1961.2 and the “California 2015 and Subsequent Model 

Criteria Pollutant Exhaust Emission Standards and Test Procedures and 2017 and 

Subsequent Model Greenhouse Gas Exhaust Emission Standards and Test Procedures 

for Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles,” adopted 

March 22, 2012, and incorporated by reference herein. The test fuel specifications 

should remain consistent from batch to batch. Optionally, manufacturers may use other 

renewable fuel blends under this paragraph that have been certified by ARB as yielding 

test results equivalent, or more stringent than, those resulting from the fuel specified by 

13 CCR 1961.2, and which are appropriate for the certification of large spark-ignition 

engines.
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(B)(D) If the engine is not a gasoline-fueled large spark-ignition engine, then the test 

fuel used shall be consistent with the fuel specifications as outlined in the "California

Exhaust Emission Standards and Test Procedures for 2001 and Subsequent Model

Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles," as of January 1, 2006

(last amended August 4, 2005) incorporated by reference in Section 1961(d), Title 13,

CCR). The California fuel specifications are contained in the California Code of

Regulations, Title 13, Chapter 5, Article 3, Sections 2290- 2293.5. If the engine is

tested using the U.S. EPA test fuel, consistent with the fuel specifications as outlined in

Title 40 Code of Federal Register, Part 1065, subpart H, the manufacturer shall

demonstrate that the emission test results complies with these Test Procedures.

(C)(E) During all engine tests, the engine shall employ a lubricating oil consistent with 

the engine manufacturer's specifications for that particular engine. These specifications 

shall be recorded and declared in the certification application.