I just use the HO grade cans from Lowe's or home-depot
wichever store is cheaper
but the disadvantage is that I have had to buy 2 5 gallon cans because they keep getting larger than normal so they eventually were to blow up but I prevented that from happening by continiously buying new gas cans
but for the new mowing season I am on the hunt for better gas cans!
even if they are $50.00 bucks