Hi all ,I have the opertunity to get about 300 gal. of old diesel fuel. When I say old I mean old 15-20 years old. What Do you think? I also got 4 gal. of old two cycle gas/oil mix. The only problem i ran into is one of the plastic jugs had blue two cycle in it.........so i thought. after dumping in the tank i read the side of the jug.......concentrated pond dye. It was gas and oil but some residue on the bottom of the jug mixed in. do you think this will be a problem? will it smoke blue