I have a 55 gal. drum of old #2 diesel that I am double filtering into 5 gallon jerry cans. I do not want to dump it in my car without treating it first, just in case it may have bugs in the fuel.
One good thing about diesel is it will last for many years, if capped. This fuel is only about 20 years old, the original diesel, before the new formulas we have now. Wish I had more, but that's all. It is (was) for my standby generator.

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1985 300D California w/cat. (257,000 + Miles)
1980 300SD (208,000 + Miles)