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It's hydrocarbon-based, likely mostly Propane. I wouldn't feel good driving around with pressurized Propane at the front of my car. Despite all the seller's website's talk about Gov't approvals in various countries of hydrocarbon-component refrigerants, here's a quote from the US Environmental Protection Agency's website:
"May hydrocarbon refrigerants be used to replace CFC-12, commonly referred to as "FreonŽ ," in cars?
No. It is illegal to use hydrocarbon refrigerants like HC-12aŽ and DURACOOL 12aŽ as substitutes for CFC-12 in automobile or truck air conditioning under any circumstances."
As for environmental friendliness - the sellers sure try to play that card - why do we suppose there are vapor recovery devices on all those gasoline pump nozzles? It's because hydrocarbon vapors are highly unfriendly to the environment.
I note they state it is "...designed as a drop in replacement for R-12..." That's a nice word, "designed". Kinda gives you a warm, reassured feeling.
When they can truthfully substitute "designed" with "approved by Ford/Volvo/GM/Toyota...the EPA, as a drop in...", etc., I'll consider it.
--
Bob (son's 81-244GL B21F, dtr's 83-244DL B23F, 'my' 94-944 B230FD; plus grocery-getter Dodge minivan, hobbycar 77 MGB, and a few old motorcycles)
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