i get a letter in the mail from chevron asking about card usage so i call them,they ask if i put in 200 dollars of diesel on friday.i told them no and she asked me do i have my card which i did.i ask her how in the hell can someone fill up on my cc number,she tells me they have a card that they put in the machine right after you are done filling up and it gets your card number and they go to another station and fill up.scary as hell and i would of not even known if they wouldnt of been greedy and put $200 in.i think im going back to carrying cash!