Beyond gas discounts, the Exxon credit card earns 5% cash back in statement credit rebates on the first $1,200 of non-fuel purchases at Exxon and Mobil stations, per year.

If we use the average cost of gas of $3.20 per gallon at a $0.10 discount per gallon of gas, we can estimate the average family may save $97.19 on gas per year using the Exxon Mobil Smart Card+ ...

Credit-card issuers like American Express (AXP), Bank of America (BAC), and Wells Fargo (WFC) offer cash-back rates at gas stations for some of their most popular rewards credit cards. The Costco ...

One thing to consider as you compare cards is that closed-loop, gas-only credit cards tend to be easier to qualify for but come with high interest rates. Take the ExxonMobil Smart Card, for example.