Last time my fridge stop working becouse of tilt was when fridge had piezo-electric igniter and could run without 12V supplied. Guess what years that was?
Anyway, my experience is that fridge will WORK even with big tilt when thermostat calls for max output.
Once it cycles off on cold night, it will not start working again till you level it and even then you might have to shut it off for few hr fot the ammonia to drain down. So if you park for the night at tilt, set thermostat to lowest temperature.
I never experienced when operating fridge at tilt will shorten its life. Sold my conversion with fridge being about 25 years old and still working perfectly.
