Synthetic Compressor Oil – ISO 100, SAE 30/40

The correct viscosity grade compressor oil is recommended for use in rotary screw, rotary vane, reciprocating and other compressor applications. Compatible with PAO, ester- and petroleum-based compressor oils. Not compatible with glycol- or silicone-based compressor oils.


Product Code: PCKQT-EA

The “red labeled one” is our best seller. This one is the main one which works with most typical compressors out there. Available in quarts.  30/40 weight. Customers report overheating temps and high energy consumption issues solved when they switch to this. If you rely on your compressor and don’t want the downtime, AMSOIL will impress!!

Compressor oil overview

AMSOIL PC 30wt and 40wt Series Synthetic Compressor Oil is a long-life, premium compressor lubricant based on novel, proprietary technology. It incorporates the highest quality, thermally stable PAO synthetics fortified with premium non-detergent additives for maximum protection at high temperatures. It lasts up to 8,000 hours, effectively reducing maintenance and waste oil disposal costs.

Improves Compressor Efficiency

AMSOIL PC Series Oil has low friction properties, resists viscosity increase from oxidation and helps improve operating efficiency.

Controls Foam and Reduces Wear

AMSOIL PC Series Oil contains anti-foam additives and, unlike some other compressor oils, is anti-wear fortified. Good foam control reduces heat, oxidation and wear. High contact regions are protected against wear for increased compressor life and lower maintenance costs.

Printable Data Sheet on the AMSOIL Synthetic Compressor Oil

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Resists Water Contamination

Water from condensation builds up in compressors and can cause unwanted oil/water emulsions that lead to rust and corrosion. AMSOIL ISO 100 PC Series Oil is hydrolytically stable. It resists acid formation, readily separates from water and is anti-rust fortified. Water can be easily drained for simplified disposal and increased oil life.

Resists Heat and Oxidation

AMSOIL ISO 100 PC Series Oil combines the inherent stability of premium synthetic base oils with specialized anti-oxidant additives to resist varnish, carbon and acid formation. It is formulated to protect compressors better and last longer in service than petroleum oils, especially during hot operating conditions.

Safety Advantage

AMSOIL PC Series Oil is an ashless, high-flash-point formulation with very low carbon-forming tendencies that minimizes the incidence of ignition-promoting “hot spots.” While PC Series Oil can provide improved fire safety, it cannot be considered non-flammable.

Application Recommendations*

AMSOIL ISO 100 30/40 WT PC Series Oil in the appropriate viscosity is recommended for use in single and multistage rotary screw, vane, centrifugal and reciprocating compressor crankcases and cylinders, vacuum pumps, pressure washer pumps and other applications such as gears, bearings, blowers and pumps. In compressor applications, drain intervals of 8,000 hours or more can be expected under normal operation. Drain intervals are subject to operating conditions and maintenance practices. Monitoring by oil analysis is recommended. For best performance when converting to AMSOIL PC Series Oil, it is recommended the compressor be flushed of the old oil and all filters changed prior to the installation of PC Series Oil. If carbon deposits are present on the internal components, it is recommended they be removed following the compressor manufacturer recommendations.

Consult the equipment manufacturer or AMSOIL Technical Services for use in specific applications.


AMSOIL PC Series Synthetic Compressor Oil is compatible with petroleum oils and most synthetic oils, seals, paints and materials, including the following:

• Nitrogen • Hydrogen • Helium • Carbon Monoxide
• Carbon Dioxide (dry) • Ethylene • Methane
• Propane • Butane • Propylene • Butylenes
• Natural Gas • Benzene • Butadiene
• Furnace (crack gas) • Hydrogen Sulfide (dry)
• Synthetic Gas • Sulfur Dioxide
• Epoxy • Oil Resistant Alkyd • Acrylic Enamel
• Acetal (Delrin) • ABS • Phenolic • Polyamide-imide
• Polyamide (Nylon)
• Polycarbonate (metal covered only)
• Polyester • Polyetherimide (Nylon) • Polyimide
• Polyphenylene oxide • Polystyrene • Polysulfone
• PTFE (Teflon) • Terephthalate.
• Fluoroelastomer (Viton) • Nitrile (Buna N)
• Polyacrylate • TFE/P • Poly Urethane.
Note: Not recommended for “breathing air” or refrigeration compressors. Not recommended for use with polycarbonate plastic that is not metal covered, PVC plastic and butyl, ethylene-propylene or SBR rubber. PC Series Oil is not compatible with polyalkylene glycol or silicone oils.


This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS). An MSDS is available via the Internet at or upon request at (715) 392-7101. Keep Out of Reach of Children. Don’t pollute.

For warranty information, visit

Compressor Oil Reviews


Compressor seems to like it..
By  Dave,  a  Verified Buyer  from  KY  on  November 27, 2017
I used this in a New Ingersoll Rand Garage Mate Air Compressor and so far it seems to be working great. Compressor runs quiet and starts without any problems even in cold weather with temps down around 35 degrees.
Bottom Line
Yes, I would recommend this to a friend.
Great stuff
By  Zipdaddy,  a  Verified Buyer  from  Ponder, Tx.  on  November 02, 2017
What I noticed from the start is that for some reason it doesn’t turn milky under high humidity conditions. Excellent products.
HAPPY compressor
By  James,  a  Verified Buyer  on  September 10, 2019
HIGHEST QUALITY compressor oil I have ever put in my compressor. This twin cylinder compressor PURRRRRS!!!
Amsoils always good
By  John,  a  Verified Buyer  on  June 12, 2019
One of the biggest concerns with an air compressor is heat when it is continuously running and the quality of this oil will help alleviate that
By  Chadasco,  a  Verified Buyer  from  Arizona  on  June 04, 2019
I have used this in all four of my compressors now. The run great and I will only use amsoil from now on
Bottom Line
Yes, I would recommend this to a friend.

I would buy again for my compressors

By  stickshooter,  a  Verified Buyer  from  Leeper , PA  on  April 19, 2019
I purchased a Craftsman’s vertical compressor and changed to AMSOIL compressor oil after break-in period. Use AMSOIL in all my equipment since 1975. I feel my equipment is better protected from breakdown when using AMSOIL.