I live in the Red River bottom land in the midst of lots of farmers. Most of them use propane in their tractor a/c's beginning with the first leak that occurs.

I have yet to hear of any fatalities or explosions with their systems.

Will I use propane for a refrigerant in anything that my family or myself ride in? Not in a million years.

R12 is still plentiful and coming down in price. When I have a problem, I find the leak, fix the leak, account for the oil loss and charge with R12.

Without doing any research, I THINK that propane is a legal refrigerant AS LONG AS the system is fitted with the proper, unique fittings and properly marked. This is required by Federal Law REGARDLESS of what alternative refrigerant is used.

It's your car, your conscience and your family, so it's YOUR business!

Best of luck,
Larry