How often does a compressor need an oil change?

This depends on various factors, such as the type of compressor, operating conditions, and the quality of the oil. However, the lifespan of the lubricating oil mainly depends on the operating environment of the compressor. Under normal circumstances, it is recommended to change the compressor oil every 500 hours or once a year. But this is just a recommended replacement time, and actual situations may vary.

It is particularly important to emphasize that the factors accelerating the aging of compressor oil are moisture and dust in the air. Dust particles smaller than 15 microns circulate with the lubricating oil. When the concentration of dust particles smaller than 15 microns is too high, an oil change is necessary. Moisture in compressed air causes the lubricating oil to emulsify, losing its lubricating effect. Additionally, moisture leads to metal corrosion, and a large amount of corrosion products smaller than 15 microns also circulate with the lubricating oil, accelerating the aging of the compressor oil. So, changing the oil is like dialysis for patients with kidney disease; regularly replacing the lubricating oil is more beneficial for the operation of the compressor and is an important means to maintain the mechanical lifespan.