Guess I'm in the minority here, but we have found that our fridge has enough insulation to keep stuff frozen for 8 hours or more, provided it was solidly frozen when put in a cold freezer that was turned on the night before. Therefore we do not run down the highway with anything running on gas. I have the fear that an open flame, even though it is several feet away from the gas pump, and even though it has never happened before to me, it will hit the right combination and disaster will strike. I have enough fear and consideration for the others at the gas pump to never take a chance on starting a fire/explosion. I never want to find out what happens when I got distracted and forgot to turn it off before pulling up to the pump, either. One may have traveled many thousands of miles with a gazillion stops for gas with the flame on, without a problem, but there is always that first time, and it may also be the last time. I don't want to be around when that happens, or worse, be responsible for it happening, just to save some food or keep some beer cold. JMHO.
2003 Ford F-350 V-10 Crew Cab 4WD Long Bed
2004 Jayco Designer Medallion 29 RLTS 5th wheel
Bill, Gayle, and Mindi (dachshund)
Retired at last !
Nothing is foolproof to a sufficiently talented fool.