I have the Pilot/FJ card that gives me .07 cents off on diesel. In addition, I have my Discover card that gives me 5% off on any fuel, including diesel. Annnnd, I also have the Good Sam Card that gives me .03 cents off per gallon.
So, for 50 gallons of fuel and at $3.00 per gal....I can save $3.50 at Pilot/FJ (using my Pilot/FJ card) and can save $7.50 off by using my Discover. However, if I use my GS card and pay with my Discover, I can save $1.50 at the pump and get $7.43 back on my Discover for a total of $8.93 savings. Or I can go to any station and use my Discover for $7.50 savings.
However, if I use my Pilot/FJ card, I have the convenience of using the truck pumps and never have to go inside.
If I use my Discover, I have to go inside, estimate the $$ amount I'm going to need in fuel, leave the card, go back out and fuel the motor home, go back inside to get my card and sign the ticket. And the same if I go to any other station (if I use the truck pumps).
With my 42 mh plus my toad, using the auto (diesel) pumps is a real challenge and not one that I would likely do.
So, for me....the convenience of paying at the pump is worth the difference in savings...at least at the Pilot/FJ. At other stations, I of course use my Discover card and have to go in to do the transaction.
Ron