Why does a screw compressor need oil?

Lubrication is vital to numerous parts of the compression process. That’s why it’s important to know why and which oil is needed for your air compressor.

SCREW COMPRESSOR OIL

1/12/2025

Screw compressor oil is essential for the compressor operation

An oil injected screw compressor requires oil for several key functions:

  • Cooling:
    Helps dissipate heat generated during compression, preventing overheating. If the temperature of the compressor is too high, the element or all rotating parts would be excessively stressed and the service life would be shortened.

  • Lubrication:
    Prevents friction and wear on moving parts, especially the rotors. Metal to metal contact could lead to operational issues and early breakdown.

  • Sealing:
    Creates an effective seal between rotors and housing for efficient compression.

  • Cleaning and Filtration:
    Traps contaminants and impurities from incoming air to protect internal components.

  • Noise Reduction:
    Can reduce compressor noise by acting as a sound barrier.

The use of generic lubricants and irregular maintenance will have negative consequences to the lifetime, overall performance and energy efficiency of the machine.

When do I need to change my screw compressor oil?

To determine when your screw compressor oil needs replacing, there are several factors that need to be taken into account.

  • Operating Hours:
    The number of hours the compressor has been running

  • Oil Type:
    Different oils have varying lifespans

  • Compressor Load:
    Higher loads may require more frequent oil changes.

  • Oil Filtration:
    Is the oil filtration system working effectively to maintain oil quality

  • Environmental Conditions:
    Harsh operating environments like high temperature, dust and humidity may require more frequent oil changes.

You should always check your maintenance history and service manual for the recommendations of the manufacturer before working on a compressor. In case of doubt, contact Green Star

Where can I buy Genuine Green star Screw compressor oil?

Green star Screw compressor oil can be bought from your local Green star dealer. Our Customer Centers and distributors are always ready to help you or to answer your questions.

Need help in selecting the right screw compressor oil?

air compressor oil
air compressor oil

How to select the perfect air compressor oil ?

The 5 most important parameters influencing the oil are temperature, humidity, dust or air quality, metal and oxygen. Some of them are almost always present in the compressor or compressor room and can be seen as a constant influence...