This will upset a lot of people, but I use hydrocarbon refrigerant (Duracool) in all my vehicles (even 1996 & 2002 after compressor replacements), with PAO 68 oil. Many bizarre claims of "explosive", yet no such actual case in millions of cars using it for decades. I did grad school research in combustion, so am allowed to think for myself. R-134A is being discontinued and no good alternative but rare R-12.
