i would never use 134A, heres y, R12 is chemical inert, meaning it doesn't react with anything at all. 134A is flamable, and it just a mixture of 2 gases, so if you have a leak the heaver gas will leak out and the lighter one will stay behind. also 134A will automatically cause you to lose 10% of your cooling capacity. freeze 12 acts just like freon 12 except its a mixture of gases as well. but you also don't loose your 10% capaticaty like 134A.
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'96 Nissan Pathfinder
'02 Firebird Trans Am.
'88 K5 Blazer
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