DIESEL FUEL''' could it be stored for more than 2 years and if so what would be the best way to do that????

Question

also should in be in a plastic barrel or metal??? thanks for your information on my question.

Answer 1

You would need to add preservatives and biocides.  There are bacteria which can live on diesel fuel and turn it into organic mush that will clog your filters; you have to make sure they don't eat your fuel, and the constituents don't separate.  This may be very difficult; petroleum diesel has a relatively short shelf-life, and one reason the military wants to go to synthetic fuel is that it lasts years instead of months.

I'd use metal barrels, but I'm old-school.