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Thread: Proper #1/#2 Diesel Blend

  1. #1
    Join Date
    Sep 2001
    Posts
    17

    Default Proper #1/#2 Diesel Blend

    I am looking for guidance on a proper blend of #1 and #2 diesel as a function of the vehicle (see below) and ambient temperature. I do most of my driving on the highway (or in the open). The ambient temperatures range from

  2. #2
    Join Date
    Feb 2000
    Location
    Montana
    Posts
    11,382

    Arrow

    I've driven a diesel pickup through 21 winters, and not had a gelling problem here in western Montana. I've seen #1/#2 blends of 30/70 most winters, with 50/50 at least one time. Some diesel pumps are marked with the blends. In Fairbanks AK, you might see 100/0 in the dead of winter.

    The fuel systems in these trucks are designed to help prevent gelling. The fuel filter assemblies are equipped with a heater that automatically energizes at +20 degrees F. (cloud point temp for straight #2). Gell protection is one reason why GM installed their fuel filters on the engine. Those with auxiliary fuel filters located elsewhere should add a heating element or bypass it during the coldest months unless they are sure of the fuel's blend.

    Jim

  3. #3
    Join Date
    Mar 2007
    Posts
    13

    Wink

    [QUOTE=lars1]I am looking for guidance on a proper blend of #1 and #2 diesel as a function of the vehicle (see below) and ambient temperature. I do most of my driving on the highway (or in the open). The ambient temperatures range from

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