Note: Because some compressors are suitable for multiple applications (and some come with just enough oil in them to prevent corrosion during shipping). Some compressors come with oil in them already, but never assume the quantity of oil included is correct for your application,. ALWAYS double check and refer to your repair manual for the proper quantity.

The compression may occur due to rapid reduction in volume, positively “sweeping” refrigerant from inlet to outlet port, and by changing kinetic energy into potential energy.