Around late February, the average price for a gallon of gas was $2.98, according to AAA. Now, less than 90 days later, the national average is $4.56 per gallon. With Americans now paying over 50% more per gallon than they did less than three months ago, largely due to the ongoing conflict in Iran, you may be looking for additional ways to save on fill-ups. Many gas stations are offering temporary discounts or credits, and some, like Shell, are launching new co-branded cards amid rising prices.