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Why didn Cummins include engines prior to 2002?

April 26, 2017cummins engines prior

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Why didn Cummins include engines prior to 2002?

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• The main reason not to include engines earlier than 2002 is due to materials compatibility concerns. Some fuel systems in pre-2002 engines contain components that are not compatible with a B20 biodiesel blend. EPA 2002 and later engines contain fuel system components that are compatible.