Any good fuel companies for a good fuel card for travel?

I use the Kroger rewards card, on average I can get ONE Dollar off a gallon. You have to manage your purchasing to achieve the full dollar and manage fueling needs so you're in an area where they or their subsidiaries are located otherwise you only get 10 cents off at Shell. In addition, if purchasing the good that earn the fuel points is through a regular credit card with their own rewards, you get those rewards as well. Double bennies.