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Home >> Isuzu >> 1998 >> Trooper S, Standard >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> A/C System General Servicing >> USING R-12 & R-134a REFRIGERANT >> Refrigerant Oils

Refrigerant Oils

NOTE: Use ONLY the specified oil for the appropriate system or A/C compressor. Always check vehicle underhood A/C specification label or A/C compressor label before adding refrigerant oil to A/C compressor/system. See Figure and Figure . Always use refrigerant oil specified on vehicle underhood A/C specification label if different from the following list.

Refrigerant R-12 based systems use mineral oil, while R-134a systems use 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.

On Harrison compressors use PAG oil specified on underhood A/C specification label or A/C compressor label. On Nippondenso compressor, use DENSO ND-Oil 8 (Part No. 38897-PR7-A01AH). On Zexel DKS-17CH compressor, use PAG Oil (Part No. 2-90188-300-0). On Zexel DKV-14D compressor, use AIPDN Oil (Part No. 2-90188-301-0).

NOTE: PAG oils absorb moisture very rapidly, 2.3-5.6 percent by weight, as compared to a mineral oil absorption rate of 0.005 percent by weight.
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