The Discover Open Road card is a great card that's not only good for gas, but it's great for other purchases as well. Whether you make a lot of purchases at a clothing store, or a grocery store, you're going to be able to reap the benefits, no matter where you go.

With the Discover branded cards, you can earn as much as a 20% bonus, when you shop with online retailers. Make sure that you read the terms, and conditions when it comes down to who qualifies, and who doesn't.

If you're into rewards, and bonuses, you can also even potentially double your rewards, when you redeem for gift cards with over 100 partners online. It's as good as cash, and you're going to get more bang for your buck!

There's no annual fee, you can pay your bills online, and there's 24/7 online account access, making it a great gas card online.