* Discover it® Cash Back gas credit card offers 5% cash back on gas, groceries, and select rotating categories each quarter (you can activate the categories you want from the Discover app or website).
* PenFed Platinum Rewards Visa Signature® Card offers 5% cash back on gas up to $1,500 per quarter and 1% cash back on everything else.
* Capital One Quicksilver Cash Rewards Credit Card offers 1.5% cash back on all purchases, including gas.
* American Express Blue Cash Preferred Card offers 3% cash back on gas, up to $6,000 per year.
* Citi Premier® Card offers 3% cash back on gas, up to $6,000 per year.