Collection: Major Components - Oil

Compressor oil is the difference between a piston or rotary screw unit that runs for decades and one that wears out early. Cast Air CAST-LUBE oils are formulated specifically for air compressors — not repurposed motor oil — with full synthetic 10W-30 and 5W-30 viscosities for piston compressors in quart and gallon sizes, plus a dedicated formula for rotary screw machines.

Cast Air has been manufacturing all-cast-iron compressors in Spicer, MN since 1991, and their lubricants are built to the same standard as the equipment. Full synthetic base stock handles temperature swings, reduces carbon buildup on valves and rings, and extends drain intervals compared to conventional oils. Using the right oil matters — especially in rotary screw units where oil carryover and separator life are directly tied to what's in the sump.

As an authorized Cast Air dealer, Air Compressor Factory Direct stocks CAST-LUBE oils ready to ship. Questions about which viscosity or quantity is right for your compressor? Call us at 866-217-0063.