Thread: A/C - r12 and r134a -- to mix or not to mix
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  #12  
Old 08-27-2010, 01:27 PM
samiam44 samiam44 is offline
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Join Date: Aug 2008
Posts: 436
easy,

R-12 will carry mineral oil or ester.
R-134a will carry ester or PAG. PAG is not compatable with mineral.

So, when you top up a system, you ussually add an ounce of oil. If you just top up a mostly empty system with R134a- the compressor will die due to lack of oil. Must add some ester.


M
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