For us, buying gas in the states is anything but easy. Try to pay at the pump and the strictly numeric keypad wants you to enter your zip code to verify the credit or debit card is really yours. I asked two Canadian banks if they had a solution and got nowhere (one claimed entering zero five times would work. It didn't.)
So you have to go inside, wait on a long line, and leave a deposit. Then you either end up not completely filling up, or having to wait on line again to get a refund. All the while inhaling fumes and dodging oil spots.