Q: Is it true that oil-free air compressors don’t need oil why?
A: No need.
Domestic commonly used oil-free air compressor “water lubricated air compressor” series with more, air compressor head work is no lubricant, but the use of water to lubricate the air compressor head. So there is no need to add lubricant, if you still add lubricant, then buy an oil-injected air compressor, not called oil-free machine.
Ltd. is a manufacturer of “water lubrication air compressor”, welcome to inquire and purchase if you need.