The American Express Blue Cash Preferred Card is great for travelers who drive more than they fly.

For starters, you'll earn up to 5% cash back on gas. And unlike other cards that give you a rewards limit, the Blue Cash card will never bump you to a lower rewards rate no matter how much you spend on gas.

If that's not enough to sell you, spend $1,000 in the first 3 months and you automatically earn $150 back. You can also get up to 6% cash back at U.S supermarkets when you spend up to $6,000 annually.