A/C Compressor Oil (PAG Oil)
Compressor oil lubricates the air-conditioning compressor and circulates through the system together with the refrigerant.
What is A/C Compressor Oil (PAG Oil)?
Most car systems use PAG oil of a specified viscosity; electric compressors in hybrids and EVs often need special POE oil because it must not conduct electricity. The correct oil type and quantity are given by the vehicle or compressor manufacturer. When components such as the condenser or compressor are replaced, oil is added to make up for what they held.
How it works
The oil travels with the refrigerant, so a system with a low charge also returns less oil to the compressor.
Why it matters for your car
Using the wrong oil in an electric compressor can lower insulation resistance and trigger high-voltage faults. Too much oil reduces cooling; too little shortens compressor life.
Other terms
- Battery Electrolyte (Battery Acid)
- Bearing Puller (Gear Puller)
- Cooling System Pressure Tester
- Crate Engine
- Dashcam (Dashboard Camera)
- Diesel Intake Throttle Valve
- Dynamo (DC Generator)
- EV Tyres
- Interior Detailing
- NOx (Nitrogen Oxides)
- Portable Charging Cable (Mode 2)
- Propeller Shaft Centre Bearing
- Remote Engine Start
- Repair Estimate (Quote)
- Safe Exit Warning (Exit Warning)
- Solenoid
- Thermostat Housing
- Towing Mirrors (Extension Mirrors)
- USB-C Port In The Car
- Wheel Cleaner