The Citi Custom Cash℠ Card allows cardholders to earn 5% cash back on their highest eligible spending category, on up to $500 of expenditure within a billing cycle, then 1%. Gas stations are an eligible category. This 5% gets applied automatically depending on your spending within the billing cycle, so be sure to use this card primarily for gas. For most commuters, this card will maximize your cash-back earnings on gas savings over all others.

Other eligible spending categories include restaurants, grocery stores, select travel, select transit, select streaming services, drugstores, home improvement stores, fitness clubs and live entertainment. 

Check out our full review of the Citi Custom Cash℠ Card.

The Citi Premier Card is a great option for anyone who does most of their spending at gas stations (and supermarkets, restaurants, hotels or air travel). When you spend in those categories, you'll earn 3x points for every dollar you spend, compared with just 1x points per dollar in all other spending categories. And you can earn points at gas stations worldwide.

These points can be redeemed for 1 cent each as a statement credit -- essentially netting you 3% return on gas station purchases. Plus, there's no cap on the amount you can earn the 3x points on. The only downside is its $95 annual fee, so make sure you're earning enough in rewards to make up for it. Check out our full review of the Citi Premier Card for more details on its other benefits.

The Blue Cash Preferred Card from American Express offers high cash-back rates for U.S. gas stations at 3%. But if you don't drive, or commute via public transit or ride-share often, you also get 3% back on those purchases (and parking, tolls, buses, trains and more). In addition to these great transit rewards, you can also earn 6% cash back at U.S. supermarkets on up to $6,000 of spending per year, then 1%, and 1% cash back on other purchases. Cash back is received in the form of Reward Dollars that can be redeemed as a statement credit.

Terms apply to American Express benefits and offers. Enrollment may be required for select American Express benefits and offers. Visit americanexpress.com to learn more.

The Discover it® Student chrome* is designed to help make credit more accessible for students and to help them build credit, but it still has surprisingly good rewards. You'll earn 2% on gas station and restaurant spending (on up to $1,000 in combined purchases per quarter, then 1%). You'll also earn 1% cash back on all other purchases, as well as an Unlimited Cashback Match at the end of your first year, as is tradition with Discover cards. Because it's a student card, it doesn't come with some of the other perks you might expect.

If you need a gas credit card for your small business, consider the Chase Ink Business Cash card. It's one of the best business credit cards on the market right now. Not only does it offer cash-back rewards on categories that businesses often need like office supplies and telecommunications, but it also offers 2% cash back on gas station purchases (on up to $25,000 in combined gas station and restaurant purchases each year) -- netting you up to $500 in cash back per year just on gas station purchases. And despite the business perks and great welcome bonus, it has no annual fee and a 0% introductory APR on purchases for 12 months (15.49% to 21.49% variable APR thereafter).

If you're a Sam's Club member, then this Mastercard might be a good option for a gas credit card. With the Sam's Club Mastercard*, not only do you earn 5% cash back on gas purchases at Sam's Club, but you earn the same 5% back at all other gas stations (on the first $6,000 in purchases per year, then 1%). It's an especially attractive card if you're a Sam's Club Plus member and can take advantage of the higher cash back at the store. However, this card doesn't come with many of the perks you'd expect of another rewards credit card, such as a large welcome bonus or 0% introductory APR.

Check out our full review of the Sam's Club Mastercard for more details.

If you're a Costco member -- or willing to become one -- the Costco Anywhere Visa Card by Citi* offers 4% cash back on eligible gas for up to $7,000 per year (then 1%). Technically there isn't an annual fee to maintain an account, but you'll need to pay $60 annually for a Costco membership. If you're averaging around $135 per week or less in gas, the 4% cash-back rate can cover your gas bill for the year. The catch is that you can only redeem your rewards on an annual basis.

For more details on how to redeem these rewards and other features, check out our full review of the Costco Anywhere Visa Card.