The Marathon Visa credit card with its spending thresholds can indeed help you to save on gas purchase. The biggest rewards are given when cardholders spend $1,000 or more per month with their Marathon credit card – that’s 25 cents per gallon. Those who spend less than $1,000 but more than $500 save 15 cents per gallon. And you will earn 5 cents per gallon if you spend less than $500 per month with your Marathon Visa card. With this rewards structure the card looks very attractive to those who buy a lot of gas at Marathon. You can apply for the card via Marathon Petroleum website.