Never heard of any four wheel vehicle being dipped--I hear it always seems to be the big trucks. I make biodiesel and store the finished fuel in an old home heating fuel tank that had lots of red dye residue on the side walls. So my fuel is pink, amber really--probably always will be. So come on, lawman, come and get me! Just kidding. As a matter of propriety, you shouldn't drive on untaxed fuel. JMHO.

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1998 E300D, 287k, barely broken in.