When I bought my office building there was a 1500 gallon tank with heating oil in it. I sampled it and found it clear. I sold it to a friend who ran it in his off road dozers and what not. There was some goo at the bottom but not much.

I have had bacteria in diesel tanks before but never from a car that sat. I got it from the gas station which had water in their tank.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.