I think most of those big rv's you see on the road are running their big frig's with propane on. There are cars that run on propane and natural gas. So I've come to just accept running it with the propane on. But I do like to check all the fittings and so on, just to be safe.
EDIT: Although I guess those vehicles that run on natural gas or propane don't have an open flame like the frig.
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