In case you want to earn rewards at different gas stations, it is better to consider general credit card with gas rewards than a gas station co-branded card. Gas station cards often can be used only at that brand of gas stations or with partners (if it has any) and the same is with the rewards earning. General gas rewards credit cards are more flexible – you can use them everywhere and earn rewards on every purchase. The Discover it® Cash Back credit card may be a good choice. Earn 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 and 1% cash back on all other purchases – automatically.