You can purchase e-gift cards for instant email delivery through Amazon or Gift Card Granny , which often offers cash-back deals.
If you want to save money on every gallon, a gas-specific credit card is a better option than a gift card. Easy Pay - Circle K how to buy a gas card
Most major brands like Shell , Chevron , and Circle K sell physical gift cards directly at the register. You can purchase e-gift cards for instant email