THE FUELS ARE NOT COMPATIBLE! The gas will change the flashpoint in Diesel and your truck will not run.If you use the gas cans for Diesel clean it out very good and mark the cans. I would by the yellows my self so ther is no confusion.
Actually a small amount of gasoline(<10%) will have no effect on a diesel except lowering the flash point of the fuel which is a consideration in an accident but not for the running of the motor.
Mercedes actually published formulae for mixing gasoline with diesel in the winter for their older mechanical engines. Maybe not a great idea for modern electronic super high injection pressure engines. But I will categorically state that a small amount (like the residual you'd end up with after emptying a jerrycan) of gasoline in diesel fuel will not affect the engine in any way.
Kurt, I meant to post in the other thread about this. Viton is widely used in diesel applications too. My guess is it is cheaper or might not have long term durability (like years and years) but many people search out viton specifically for use in diesels.
my understanding was that the wedco cans used the same gasket material for both diesel and gas cans. i'll probably pick up some spare gaskets to have on hand anyway.