SG Series Synthetic Extreme-Pressure Gear Oil

Industrial-Grade Performance & Protection

Industrial maintenance teams need a high-quality gear oil to maximize efficiency. We formulated SG Series Synthetic Extreme-Pressure Gear Oil to do just that. It is a PAO-based synthetic gear oil that meets or exceeds the latest and most demanding industrial gear box specifications. SG Series passes the stringent FAG FE-8 Bearing Test and, while not all extreme-pressure (EP) oils protect against micropitting, SG Series passed industry-standard micropitting testing, earning a “high” classification for strong protection. In fact, SG Series delivers superior physical properties compared to many competitive synthetic gear oils. It provides complete gear-box protection.

Extreme-Pressure Protection

SG Series Gear Oil is engineered to prevent metal-to-metal contact and inhibit corrosion. Its shear-stable, high-viscosity-index formulation features excellent anti-foam and air-release properties. SG Series Gear Oil maintains a thick lubricating film and is fortified with a heavy treatment of specialized sulfur/phosphorus EP and anti-corrosion additives. Under extreme pressures that may breach the lubricant film, an iron-sulfide barrier protects gear surfaces and inhibits wear, pitting and scuffing. SG Series Gear Oil demonstrates exceptional extreme-pressure performance in the industry-standard Timken OK Load, FZG Scuffing Load and micropitting tests.

High-Temperature Durability

AMSOIL SG Series Gear Oil is formulated with durable base oils that are naturally resistant to oxidation. It also contains oxidation inhibitors and thermally stable additives for increased resistance to sludge formation, deposits, acid buildup and thermal degradation. All viscosities of SG Series passed the ISO 12925-1 (CKD) test, demonstrating its high-temperature performance. To achieve the CKD level of oxidation resistance, the oil must pass the ASTM D2893 oxidation test at a temperature of 121ºC (250ºF) for 312 hours (13 days), after which viscosity increase and precipitants (“fall out”) are measured. SG Series helps deliver clean gears and housings throughout a long service life.

Excellent Cold-Temperature Fluidity

SG Series Gear Oil’s wax-free, high-viscosity-index base oils demonstrate excellent cold-flow properties and extremely low pour points. It helps improve cold-temperature efficiency, reducing the need for sump heaters and seasonal oil changes, while providing easier start-up for equipment.