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Old 04-16-2014, 10:34 PM   #1 (permalink)
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Join Date: Jul 2011
Location: Vancouver Island, Canada
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Dusty - '98 VOLKSWAGEN Beetle TDI
90 day: 60.42 mpg (US)
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Mix transmission fluid in diesel fuel for longevity.

A common practice with many diesel heavy equipment owners is to add 1/4 cup of transmission fluid per 150L of diesel to keep their diesel semi's or equipments fuel pump lubricated and engine carbon free.

Myth or real benefit is what I am curious about, and is it ATF or type F fluid that works best ?

Since I have a tired old diesel fuel pump ($1800) I am going to start adding trans fluid to my fill ups to lube the pump , not sure if it will actually clean carbon but lubricating the fuel pump sounds probable to me..

for my fill ups of 55L i will add 1/10th a cup / 25ml of ATF

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