What about oil-free air compressors?

Oil-free is good, and it is clearly arranged for you from the price. Oil-free is several times the price of oil (not the kind of small piston air compressor).

The compressed air produced by the oil air compressor is with a small amount of oil, and it must be filtered, and it is still endless.

No oil as long as the water on the line (oil also want to remove water).

In industries such as food, medical and high-end electronics, the use of oil-free air compressors is a must, and every impurity is extremely irresponsible for the product.