SuperAmerica has now the following promotion: you can save up to 8¢ per gallon using SuperAmerica credit card and My SA Rewards card. If you use only SuperAmerica credit card, you will save 5¢ per gallon at SuperAmerica locations. But before applying, you should think carefully, if it is the right decision. SuperAmerica credit card can only be used at SuperAmerica locations and comes with high APR. It is better consider applying for a gas rewards credit card. For example, the Discover it® Cash Back credit card gives you up to 5% cash back at different places each quarter like gas stations, grocery stores, restaurants, Amazon.com and more up to the quarterly maximum each time you activate. All other purchases will earn 1% cash back. All the cash back earned at the end of your first year will be matched, automatically (provided you are a new cardmember). This credit cards comes with 0% (14 months) into APR on purchases, when the introductory interest rate is over, the ongoing APR will apply.