Refrigerant Oils

NOTE: Use ONLY the specified oil for the appropriate system or A/C compressor. Always check the underhood A/C specification label or A/C compressor label before adding refrigerant oil to A/C compressor/system. See Figure . If engine compartment/ compressor label specifications differ from specifications in this article, use underhood/compressor label specifications.

Refrigerant R-12 based systems use mineral oil, while R-134a systems use synthetic/Polyalkylene Glycol (PAG) oils. Using a mineral oil based lubricant with R-134a will result in A/C compressor failure due to lack of proper lubrication. The following R-134a refrigerant oils are currently available:

Use ND-Oil 8 refrigerant oil (Part No. 38899-PR7-003) on Nippondenso 10-cylinder compressors. Use ND-Oil 8 refrigerant oil (Part No. 38885-09109) on MX-6 and 626 with Panasonic rotary vane compressors. Use YN-12b PAG oil (Part No. F2AZ-19577) on Ford FS-10 compressors. Use ND-Oil 9 refrigerant oil on Miata with Nippondenso TV12 rotary vane. Use ATMOS GU-10 refrigerant oil on Millenia with Panasonic rotary vane. Use PAG SP10 refrigerant oil on Protege with Panasonic rotary vane compressors.

NOTE: Synthetic/PAG oils absorb moisture very rapidly, 2.3-5.6 percent by weight, as compared to a mineral oil absorption rate of .005 percent by weight.