Shell Saver Card - United States
Save 5 Cents per gallon of gas from now through June 1st. After June 1st it is 2 cents a gallon. You can pick up a card from any Shell Gas Station and activate it online. Then you link it to your checking account. You use the saver card to pay for the transaction and 5 or 2 cents will be taken off per gallon.
I got ones of these cards. Only because there is one about a mile from my house. Will only use in emergencies though, because even with the 5 cent discount I can still find cheaper gas elsewhere. You have to link one of your checking accounts to it though. I wish they would link it to paypal/rme.