Tjaybird:divide liters by 3.7854 (so a liter is a little larger than a quart)
5 L, 10 L, 20L is about 1.3 gallons, 2.6 gallons, 5.3 gallons
gasoline: about 6 lb/gal
diesel: about 6.943 lb/gal (call it 7 lb /gal)
so 8 pounds, 16 pounds, 32 pounds for gasoline
9 pounds, 18 pounds, 37 pounds for...