If you want a gas card with a rewards program, consider the gasoline credit cards we offer. These cards are not tied to a particular gas station, but are accepted at most gas stations including Exxon. For example, if you apply for the Discover it® Cash Back credit card you will earn 1% cash back on all purchases including gas, which is slightly more than a 3¢ per gallon discount at current prices. Use the card for your everyday purchases as well and get even more cash back. The issuer also has quarterly rotating categories during which you can earn 5% cash back. Gas gets 5% cash back once a year for three months. That will earn you 15 cents per gallon at current rates during those months.