Quote:
Originally Posted by pilot53
... I don't want to use freeze12, I'm asking about r12a which is a hydrocarbon refrigerant compatible with r12 systems, it has nothing but high purity butane and propane in it. ...
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Aren't Freeze12, Red Tec 12a, Enviro-safe, and Duracool all similar HC mixtures? I have used the later since ~1997 in my 65 Newport and now in all my vehicles, incl the minivans after compressor replacements. Duracool is from Canada, and I think more common there. I wouldn't retrofit R-134A today since outlawed for years in many countries and soon to be in the U.S., so you would soon be relying on recovery stock, and perhaps prices rising like it did for Freon. New cars use R1234yc or CO2. The former has safety concerns (read M-B export to France issue) and the later requires extreme pressures, which could lead to expensive repairs in the future. But, the EPA long ago dissed HC refrigerants for somewhat absurd reasons, which you can read on their website. They even outlaw venting HC refrigerant, though cows do that all day long.