I actually did it once back in the early 90's ! had a 5.9 cummins. had worked 12 hrs in ATL, got off work at 1am and drove straight down to our condo in Destin, Fla., about 20 miles away I stopped for fuel, back then the diesel pumps were always off by themselves. well I pulled over to the pump and walked inside gave the cashier money and the pump number. luckily she gave me a receipt, I walked out filled my truck and drove to the condo. when I got there I emptied my pockets and for some reason looked at the receipt HOLY FUCK SUPER PREMIUM . I guess with all the big boats filling up they had the pump off to the side for them ! had to siphon 30 gals of diesel/gas mix out and refill it but got really lucky and nothing was damaged ! don't ever say it'll never happen to me !