The Goodsams RV Plus credit card will save you 10 to 12 cents off the credit card cost of diesel at Flying Js and Pilot truck stops. Additionally you don't have to go into the Service center/ Restaurant to pre pay for the Diesel. The credit card works at the pump. I fill up where the trucks do. You have much more maneuvering room than in a gas filling station. I took driving classes from the RV Safety Association when we got our RV. The best thing I remember from the school is ---"remember it is a recreational vehicle so go slow in any change."
