Google PenFed and you want the Cash Rewards Platinum card. You'll need a second account and I opened a $25 money market account.
Yes, I get 5% off of the fuel price every month and the card has to be swiped at the pump. I also use the Kroger points and GS Swipe & Save at Pilot/FJ for discounts.
2009 Holiday Rambler 42' Scepter with ISL 400 Cummins
750 Watts Solar Morningstar MPPT 60 Controller
2014 Grand Cherokee Overland
Bob