not sure if this has been suggested, but on a road trip sometimes a small stash of CASH might save your bacon. I keep 40-50 bucks in my canvas tool bag. You never know if you may need to make a purchase where there are no visa terminals available.
Great advice. I learned the hard way when I drove my wife's car, which for some reason always has the fuel light on why I get it, and ended up in a major blackout. The only stations that were pumping were cash only. Of which I had zilch.
Now I keep $40 in 5's and 1's in the first aid kit.
