Compressor oils

Can I use standard motor oil in my air compressor?

No, you should never use standard motor oil. Motor oils contain detergents that foam when agitated in a compressor, which can bypass the oil separator and ruin your air tools or even cause fires. Airpower supplies specialized non-foaming mineral and synthetic oils specifically designed for the high temperatures of piston and screw compressors.

What is the difference between Mineral and Synthetic compressor oil?

Mineral oil is cost-effective and suitable for standard operating conditions with more frequent oil changes. Synthetic oil (like our CPI range) offers superior heat resistance, longer service intervals, and better protection against varnish buildup, making it ideal for heavy-duty industrial screw compressors.

Do you stock food-grade compressor oil?

Yes, we stock CPI Synthetic Lubricants with H1 and H2 food-grade classifications. These are essential for facilities in the food and beverage industry to ensure compliance with safety standards in case of incidental contact with the product.

How do I know which viscosity oil to buy for my compressor?

The correct viscosity (thickness) is critical for pump protection. Most piston compressors use ISO 100, while rotary screw compressors typically use ISO 46. Check your manual or contact Airpower with your compressor model, and we will supply the OEM-approved spec.

Why does my compressor oil turn milky?

Milky oil indicates water contamination, usually caused by condensation that hasn’t burned off because the compressor isn’t running hot enough or long enough. This damages bearings. You should drain and replace the oil immediately and check your condensate drains.