I know all of you grizzled vets already know this, but for us noobs, this might come in handy. So for most gas stations, there are typically two different prices. One price is the cash/debit price and the other price is the credit card price. Usually, the CC price is about 10 cents more per gallon.
The workaround is to use a gas gift card for whatever gas station you’re at, as you will be charged the cash/debit price. And best of all, you can purchase the gift card using your rewards earning CC. Stack it with some fuel rewards for even further savings, as most grocery stores probably sell the gas gift card you need.