Synthetic Compressor Oil

Amsoil Synthetic Compressor Oil – ISO46, SAE 20W (PCI)

Amsoil Synthetic Compressor Oil - ISO46, SAE 20W (PCI)
ISO46, SAE 20W (PCI)
Data Bulletin 

Product Highlights

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.

AMSOIL PC 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.

Package Sizes (PCI)

Code Sizes Units
PCIQT (PCIQT-CA) Quart Case of 12
PCI05 (PCI05-EA) 5-Gallon Pail Each
PCI30 (PCI30-EA) 30-Gallon Drum Each
PCI55 (PCI55-EA) 55-Gallon Drum Each
PCI27 (PCI27-EA) 275-Gallon Tote Each

Resists Water Contamination

Water from condensation builds up in compressors and can cause unwanted oil/water emulsions that lead to rust and corrosion. AMSOIL 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 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 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:

Gases: • 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

Paints: • Epoxy • Oil Resistant Alkyd • Acrylic Enamel

Plastics: • Acetal (Delrin) • ABS • Phenolic • Polyamide-imide • Polyamide (Nylon) • Polycarbonate (metal covered only) • Polyester • Polyetherimide (Nylon) • Polyimide • Polyphenylene oxide • Polystyrene • Polysulfone • PTFE (Teflon) • Terephthalate

Elastomers: • 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.

Amsoil Product Warranty

Amsoil products are backed by a Limited Liability Warranty. For complete information visit

Amsoil Synthetic Compressor Oil – ISO46, SAE 20W (PCI)
ISO Viscosity Grade (ASTM D2422) 46
Kinematic Viscosity @100°C cSt (ASTM D 445) 7.3
Kinematic Viscosity @40°C cSt (ASTM D 445) 43.0
Viscosity Index (ASTM D 2270) 132
Flash Point °C (°F) (ASTM D 92) 252 (486)
Fire Point °C (°F) (ASTM D 92) 274 (529)
Pour Point °C (°F) (ASTM D 97) -47 (-53)
Four-Ball Wear Test (ASTM D 4172)
(40 kg, 1200 rpm, 75°C, 60 min.)
Specific Gravity, g/mL (ASTM D1298) 0.8428
Density, lb/gal (ASTM D1298) 7.018
Copper Strip Corrosion Test (ASTM D130) 1A
Foam Tendency, Seq. I, II, III (ASTM D892) 0/0/0
Dielectric Strength, voltage, kV AC (ASTM D877) 45.4
Demulsibility (ASTM D1401) 40-40-0 (10)
Rust Test (ASTM D665 A & B)
Fresh Water and Synthetic Sea Water