Freeze 12 on clones are 80% R-134 and the rest is a Freon that will circulate the old mineral oil through the system.
Trouble is, they are azeoptropic mixtures which leak at an uneven rate, meaning that the "good stuff" that carries the mineral oil through the system MAY sneak out b-4 the R-134 does, making for POOR compressor lube and you know what that means!
If you change the dryer and get MOST of the mineral oil out of the system you can then add Polyolester (POE) oil and THEN simply use R-134A.
However, NEVER add polyalkylene glycol (PAG) oil to a system with ANY TRACE of mineral oil (or POE oil left in it. Snotty jello makes for a poorly-working AC!
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Today's Featured Article - When Push Comes to Shove - by Dave Patterson. When I was a “kid” (still am to a deree) about two I guess, my parents couldn’t find me one day. They were horrified (we lived by the railroad), my mother thought the worst: "He’s been run over by a train, he’s gone forever!" Where did they find me? Perched up on the seat of the tractor. I’d probably plowed about 3000 acres (in my head anyway) by the time they found me. This is where my love for tractors started and has only gotten worse in my tender 50 yrs on this “green planet”. I’m par
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