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Home >> Kia >> 2019 >> Optima EX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 264 (Air Conditioning System (PHEV)) >> Compressor Oil >> Repair Procedures >> Oil Specification >> Notes
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Oil Specification: Notes

WARNING: This page is about a different variant/trim than selected.
  1. The HFC-1234yf system requires synthetic (POE) compressor oil whereas the R-12 system requires mineral compressor oil. The two oils must never be mixed.
  2. Compressor (POE) oil varies according to compressor model. Be sure to use oil specified for the model of compressor.
    WARNING:
    • If PAG oil mixes into the POE oil of the system, dielectric breakdown may occur due to decreased volumetric resistivity and the A/C compressor may not work.
    • If the POE oil gets mixed with PAG oil, replace the compressor with new one and clean inside the A/C system (condenser, refrigerant line, evaporator and etc.)
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