The current approved engine models are as follows:

On-Highway:  ISX, ISM, ISL and ISB engines certified to EPA ’02 and later emissions standards, ISL, and ISB engines certified to Euro 3.

Off-Highway: QSX, QSM, QSL, QSC, QSB6.7, QSB4.5 and QSB3.3 engines certified to Tier 3/Stage IIIA, QSM Marine, QSM G-Drive.

High Horsepower Off-Highway built after January 1, 2008: QSK78, QSK60, QSK50, K2000E, K50, QSK45, QSK38, K1500E, K38, QST30, QSK23, QSK19 and K19.  Also Marine QSK60, QSK50, K50 QSK45, QSK38, K38 QSK19, K19. 

Cummins has approved B20 for the high horsepower engines listed above with the following fuel systems: Pressure Timed, High-Pressure Injection, Modular Common Rail Fuel Injection System and BOSCH Pump-Line-Nozzle.

Biodiesel must conform to the American Society of Testing Materials (ASTM) specifications.  B100 must conform to ASTM D6751 prior to blending, and the finished B20 blend must conform to ASTM D7467.

ASTM D6751 specification for B100 has been revised to now include a cold soak test.  The B100 fuel is cold soaked and filtered in order to catch impurities or incomplete reactions resulting from the production process.  As mentioned in previous communications, the stability requirement is still in effect and is a critical requirement when B100 is blended with petrodiesel to produce a B20 blend.

ASTM D7467 is a new specification which applies to biodiesel blends of B6 – B20 and includes an oxidation stability requirement.  This specification replaces Cummins’ previous Engine Manufacturers Association (EMA) B20 specification requirement.

In Europe, specifications for biodiesel are issued under EN 14214. EN 14214 is published by CEN, the European Committee for Standardization or Comite Europeen de Normalisation.

Equivalent biodiesel specifications are required internationally.

Customers are required to purchase the biodiesel blend from a BQ9000 Certified Marketer. The B100 fuel used in the blend must be sourced from a BQ9000 Accredited Producer. BQ9000 Certified Marketers and Accredited Producers can be found at

Cummins has recently updated the Fuels Requirements – Service Bulletin 3379001.  It can be obtained on Cummins QuickServe website at Customers can also contact their local distributor and certified dealers for the bulletin.

Cummins requires the use of a StrataPore™ fuel filter media, and strongly recommends using Cummins Filtration™ filters equipped with StrataPore™ media.  If StrataPore media is not used, then an equivalent filter that meets specific performance standards must be used. For more information, please visit

Cummins also requires high horsepower marine applications to use a centrifuge filtration system to safeguard against water contamination as water intrusion is common in vessel fuel storage tanks.  Cummins recommends all commercial marine applications to use centrifuge filtration systems as well.  For more information please review the Fuel Requirements - Service Bulletin, number 3379001.

Due to the solvent nature of B20, and the potential for ‘cleaning’ of the vehicle fuel tank and lines, new fuel filters must be installed when switching to B20 on used engines.  Fuel filters will need to be replaced at half the standard interval for the next two fuel filter changes. After this initial period, you may revert to the intervals specified in your O & M manual.

For EPA 2007 on-highway midrange engines only, oil sampling will be necessary for the first 6 months of operation with B20 to monitor fuel dilution of the lubricating oil.

For high horsepower engines equipped with the Eliminator™ oil filter option, oil sampling will be needed to determine the appropriate oil change interval.  Oil samples should be taken every 250 hours of operation and analyzed according to the Cummins Engine Oil Recommendations Bulletin 3810340 which can be found on or through local distributors and certified dealers.  This process should be repeated for at least three oil change intervals to ensure consistent oil behavior.

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