The 39433735 Ultra Coolant Compressor Oil 5 gal-Made in USA is a Premium Grade Synthetic replacement air compressor oil designed for Ingersoll Rand air compressors. It offers full pour over compatibility with existing air compressor lubricant. This compatibility means that flushing of the existing compressor oil is not necessary to change to Our 39433735 Ultra Coolant Compressor Oil saving you time and money that can be used elsewhere.