Wife has a card that gains points for purchases at various places including Exxon.
In South Carolina near Columbia we filled up, 92 gallons, for 40.31.
Filled up the car later for a little over four dollars.
Plenty card or some such.
At one station we paid 1.83 gal on Sunday northern part of SC.
We have the .03 discount card from Flyin J/Pilot but on a hundred gallons that's only 3.00 and generally a higher starting price.
I never did get a Pentagon Fed credit card with five percent rebate on all purchases.
Paid off the last of credit cards two weeks ago and don't intend to put anything on another. got three or four empty and will cancel them when it won't hurt credit rating. Yes it hurts credit rating to cancel them.
Debit/Credit Cards we have too but only use debit.
It pays to buy with cash. Found we could by fish off dock for ten perent less among other things.