AMSOIL ISO 100 100% SYNTHETIC COMPRESSOR OIL

AMSOIL ISO 100 100% Synthetic Compressor Oil delivers extended drain intervals up to 8,000 hours and superior high-temperature protection for reciprocating compressors, single-piston vacuum pumps, and other demanding applications that call for an ISO VG 100 lubricant. Built on thermally stable PAO synthetic base oils with premium non-detergent additives, it outlasts and outperforms conventional petroleum compressor oils where it counts most.

Compressors running ISO 100 viscosity grades typically see high discharge temperatures, heavy mechanical loads, and continuous duty cycles. Under these conditions, petroleum-based oils break down quickly, forming varnish and carbon deposits that reduce efficiency, increase energy costs, and shorten equipment life. Water condensation compounds the problem, creating emulsions that promote rust and corrosion inside crankcases and cylinders.

SUPERIOR VARNISH RESISTANCE AT HIGH TEMPERATURES
Varnish buildup inside a compressor restricts airflow, fouls valves, and eventually causes mechanical failure. AMSOIL tested its PC Series Synthetic Compressor Oil head-to-head against a leading competitor's synthetic compressor oil in industrial rotary-screw compressors operating at a 200°F oil discharge temperature. Using the Membrane Patch Colorimetry Test (ASTM D7843), the competing oil reached critical varnish potential at just 6,228 hours. AMSOIL PC Series maintained ultra-low varnish potential through the full 8,000-hour test interval. That translates directly to fewer unplanned shutdowns and longer compressor life.

35% LESS OIL CONSUMPTION
Frequent top-offs waste time and money, especially in facilities running multiple compressors. In a side-by-side 8,000-hour test under identical operating conditions in an industrial rotary-screw compressor, AMSOIL PC Series Synthetic Compressor Oil required 35% less top-off oil than the leading competitor's synthetic compressor oil. Excellent foam resistance and air-release properties keep oil where it belongs rather than being carried out with compressed air.

CONTROLS FOAM AND REDUCES WEAR
Some compressor oils skip anti-wear additives entirely. AMSOIL PC Series is anti-wear fortified, recording a 0.45mm wear scar in Four-Ball Wear Testing (ASTM D4172). Foam control is equally thorough, with 0/0 readings across all three sequences of ASTM D892 testing. Less foam means less heat, less oxidation, and less mechanical wear on rotors, vanes, and bearings.

RESISTS WATER CONTAMINATION AND RUST
Condensation is unavoidable in compressor systems. AMSOIL PC Series Oil is hydrolytically stable and separates cleanly from water, achieving 40/40/0 demulsibility in just 10 minutes (ASTM D1401). It passes ASTM D665 A and B rust testing in both fresh water and synthetic sea water. Water drains easily from sumps, simplifying disposal and extending oil life between changes.

HIGH FLASH POINT FOR IMPROVED SAFETY
Carbon deposits inside compressors create hot spots that can ignite petroleum-based lubricants. AMSOIL PC Series ISO 100 is an ashless formulation with a 504°F flash point (ASTM D92) and a 525°F fire point, with very low carbon-forming tendencies. While it is not classified as fire-resistant, it provides a meaningful safety margin over conventional compressor oils in high-temperature service.

SPECIFICATIONS AND COMPATIBILITY
AMSOIL ISO 100 Synthetic Compressor Oil (PCK) is an ISO VG 100, SAE 40 grade lubricant. It is recommended for use in single-piston and single-stage reciprocating compressor crankcases and cylinders, vacuum pumps, pressure washer pumps, gears, bearings, blowers, and pumps that specify an ISO 100 viscosity grade. It is compatible with PAO-based, ester-based, and petroleum-based compressor oils. It is not compatible with polyalkylene glycol or silicone-based oils. It is not recommended for breathing air compressors or refrigeration compressors.

SERVICE LIFE
Drain intervals of up to 8,000 hours can be expected under normal operation. Actual intervals depend on operating conditions and maintenance practices. Oil analysis monitoring is recommended. For best results when converting to AMSOIL PC Series Oil, flush the compressor of old oil, remove any carbon deposits per the compressor manufacturer's recommendations, and change all filters before installation.