AMSOIL ISO 46 100% SYNTHETIC COMPRESSOR OIL

AMSOIL PC Series ISO 46 Synthetic Compressor Oil delivers extended drain intervals up to 8,000 hours and measurably lower oil consumption in rotary screw, rotary vane, centrifugal and reciprocating compressors. It is built on thermally stable synthetic base oils with non-detergent additive technology designed specifically for the demands of continuous-duty compressed air systems.

Compressors run hot, often with oil discharge temperatures at or above 200°F for thousands of hours at a stretch. At those temperatures, conventional petroleum oils break down quickly, forming varnish on valve plates and internal passages, thickening from oxidation and losing the ability to separate from water. The result is increased energy consumption, unplanned downtime and shortened compressor life. A synthetic compressor oil formulated for this environment is not an upgrade. It is the baseline for reliable operation.

SUPERIOR VARNISH RESISTANCE
Varnish buildup restricts oil flow, fouls valves and degrades compressor efficiency over time. In a head-to-head test against a leading competitor's ISO 46 synthetic compressor oil, both products were run in industrial rotary screw compressors at a 200°F oil discharge temperature and evaluated using the Membrane Patch Colorimetry Test (ASTM D7843). The competitor oil reached critical varnish potential after just 6,228 hours. AMSOIL PC Series ISO 46 maintained ultra-low varnish potential through the full 8,000-hour test period. That difference can mean the gap between a scheduled oil change and an unscheduled teardown.

REDUCED OIL CONSUMPTION
Frequent top-offs waste oil and labor hours. In the same 8,000-hour rotary screw compressor comparison, AMSOIL PC Series ISO 46 required 35% less top-off oil than the leading competitor synthetic. The oil's excellent foam resistance and air-release properties help keep oil where it belongs, in the compressor, rather than being carried out with the discharge air.

CONTROLS FOAM AND REDUCES WEAR
Foam in a compressor oil accelerates oxidation and heat buildup while starving bearing surfaces of lubrication. AMSOIL PC Series ISO 46 is formulated with anti-foam additives and produces 0/0 foam tendency and stability across all three sequences of ASTM D892 testing. It is also anti-wear fortified, recording a 0.42mm wear scar in Four-Ball Wear testing (ASTM D4172, 40 kg, 1200 rpm, 75°C, 1 hour). Many competing compressor oils omit anti-wear additives entirely.

RESISTS WATER CONTAMINATION
Condensation is unavoidable in compressor systems, and water that emulsifies with the oil promotes rust, corrosion and acid formation. AMSOIL PC Series ISO 46 separates cleanly from water in just 10 minutes in ASTM D1401 demulsibility testing (40/40/0 at 10 minutes). It passes both fresh water and synthetic sea water rust testing per ASTM D665 A and B, and its hydrolytic stability resists acid formation even in the presence of moisture. Water can be drained from the sump without pulling usable oil with it.

HIGH FLASH POINT AND SAFETY
Carbon deposits inside a compressor discharge system can create ignition-promoting hot spots. AMSOIL PC Series ISO 46 is an ashless formulation with a flash point of 500°F and a fire point of 550°F (ASTM D92). Its very low carbon-forming tendencies reduce the risk of deposit-related ignition events. While it provides improved fire safety over petroleum compressor oils, it is not classified as fire-resistant.

SPECIFICATIONS AND COMPATIBILITY
AMSOIL PC Series ISO 46 (PCI) meets ISO VG 46 viscosity requirements and is compatible with PAO-based, ester-based and petroleum-based compressor oils. It is compatible with common compressor seal materials including fluoroelastomer (Viton), nitrile (Buna N), polyacrylate, TFE/P and polyurethane. It is also compatible with epoxy, oil-resistant alkyd and acrylic enamel paints, as well as a wide range of plastics including PTFE (Teflon), Delrin, ABS, phenolic, nylon and polyester. It is not compatible with polyalkylene glycol or silicone-based oils. Not recommended for breathing air compressors, refrigeration compressors, or use with polycarbonate plastic that is not metal-covered, PVC plastic, or butyl, ethylene-propylene and SBR rubber.

SERVICE LIFE
In rotary compressor applications (screw, vane, centrifugal), drain intervals of up to 8,000 hours can be expected at discharge temperatures up to 200°F under normal operating conditions. Drain intervals are subject to operating conditions and maintenance practices. Oil analysis monitoring is recommended. For best results when converting from another oil, flush the compressor system, remove any existing carbon deposits per the manufacturer's guidelines and change all filters before installing PC Series Oil.