Refrigerant Oil: Description and Operation

The refrigerant oil used in R-134a refrigerant systems is a synthetic-based, polyalkylene glycol (PAG), wax-free lubricant. Mineral-based R-12 refrigerant oils are not compatible with PAG oils, and should never be introduced to an R-134a refrigerant system.

There are different PAG oils available, and each contains a different additive package. Use only refrigerant oil of the same type as recommended to service the refrigerant system (always refer to the specification tag included with the replacement A/C compressor or the underhood A/C system specification tag).

The Sanden TRS-090 A/C compressor used in this vehicle is designed to use ND-15 PAG refrigerant oil. Use only this type of refrigerant oil when servicing the A/C compressor for the 2.0L and the 2.4L Turbo
engine.

The Visteon HS-15 A/C compressor used in this vehicle is designed to use VC-46 PAG refrigerant oil. Use only this type of refrigerant oil when servicing the A/C compressor for the 2.7L and the 2.4L NA engine.

After performing any refrigerant recovery or recycling operation, always replenish the refrigerant system with the same amount of the recommended refrigerant oil as was removed. Too little refrigerant oil can cause A/C compressor damage, and too much can reduce A/C system performance.

PAG refrigerant oil is more hygroscopic than mineral oil, and will absorb any moisture it comes into contact with, even moisture in the air. The PAG oil container should always be kept tightly capped until it is ready to be used. After use, recap the oil container immediately to prevent moisture contamination.