I simply use my OpenRoads app that is tied to the tsd card to check for the route I will be traveling that day. I also double check GasBuddy to make sure none of the other regular stations (ie. Walmart, etc.) might have it cheaper.
Over the past 3 months of traveling through 10 different states the tsd card has saved me the most so far.
Stand For The Flag.....Kneel For The Fallen
2021 F350 pulling Cyclone 4006 Fiver
U.S. Army: VN 71-72 (64B20)