Compressor Maintenance: Oil Changes (Rotair)

How to change the compressor oil and engine oil in a Rotair compressor.

Keep in mind that your compressor uses both compressor oil and the engine oil, and both will have to be changed. Always refer to the manufacturer's recommendations for specific details.

Oil and filter replacement schedules for the 185CFM, 300CFM, and 425CFM Rotair compressors are the same. Below is a quick reference for the maintenance schedule, but please refer to your user manual for complete instructions and more details.

Compressor Oil

  • Change oil after the first 50 hours, and then every 500 hours after that.
  • Oil change intervals must never exceed 1,500 hours of work
  • Compressor oil should be AW-46 or ISO-46 Hydraulic Oil (AW = All Weather)
  • Do not use engine oil! Compressor oil and engine oil are not interchangeable.
  • Take into consideration the working conditions in which the machine operates (dusty conditions, very high temperature, etc can require more frequent oil changes)
  • Always refer to your user manual for complete instructions.

Recommended Compressor Oil

compressor oil recommendations

Compressor Oil Filter

The compressor oil and the compressor oil filter must be replaced in conjunction.

Purchase compressor oil filters here:

compressor-oil-filter-185

185CFM

compressor-oil-filter-300

300CFM

compressor-oil-filter-425

425CFM

Engine Oil

  • Change oil after the first 50 hours, and then every 500 hours after that.
  • Viscosity must be appropriate to the ambient temperature to which the engine is to be exposed.
  • Always refer to your user manual for complete instructions.

Recommended Kohler Engine Oil (185CFM and 200CFM Rotair compressors)

kohler engine oil recommendation

Recommended Cummins Engine Oil (425CFM Rotair compressors)

The Cummins user manual recommends the following: "Use a high-quality 5W-40 heavy-duty engine oil, such as Valvoline Premium Blue Extreme or its equivalent." (page 260)

cummins oiil chart 1

cummins oil chart 2

Engine Oil Filter

The engine oil and the engine oil filter must be replaced in conjunction.

Purchase engine oil filters here:

engine-oil-filter-185-300

185CFM

engine-oil-filter-185-300

300CFM

engine-oil-filter-425

425CFM