Modern vehicles are designed with more horsepower and torque than in years past, allowing them to haul and tow heavier and heavier loads. This results in higher gear loading and hotter running differentials. In addition, factors such as increased interior space and lower floor boards push axles higher into the vehicle's body, reducing air flow and increasing heat. The closer proximity of the axles to the exhaust system also effectively raises heat, while more aerodynamic body styles and air dams result in restricted air flow to the differentials.

A number of factors cause SUV, pickup truck and van gears to operate under more severe conditions than over-the-road trucks, contributing to increased temperatures, higher gear loading and shorter drain intervals. First, these vehicles have smaller gears that must handle higher loads per square inch of surface area. Second, their smaller sump sizes (and lower volume of gear lube) cannot dissipate heat as well as larger sump sizes. Third, air flow is significantly reduced compared to over-the-road trucks. Fourth, these vehicles are subject to more frequent stop and go driving conditions and are more susceptible to moisture from condensation due to varying temperature fluctuations.

The AMSOIL Solution

In order to optimize its gear lubes for modern applications, AMSOIL has updated its gear lube formulations.

SEVERE GEAR ™ Synthetic Extreme Pressure Gear Lubes (75W-90, 75W-100 & 75W-140)
Specially formulated for severe duty applications, AMSOIL SEVERE GEAR ™ Synthetic Extreme Pressure Gear Lubes are excellent for vehicles that experience towing, hauling, steep hill driving, commercial use, racing, off-road use, rapid acceleration, stop and go driving and high ambient temperatures. AMSOIL SEVERE GEAR ™ Gear Lubes are formulated with increased levels of premium quality additives, allowing improved limited-slip and locking differential performance.

And with high viscosity indices, SEVERE GEAR ™ Gear Lubes provide an extra level of protection at high temperatures. Extra additives provide additional insurance against wear in case of a lubricant film breach. These additives provide an iron sulfide barrier coating that effectively prevents micro-welding that leads to heat and friction. This allows AMSOIL SEVERE GEAR ™ Gear Lubes to prevent thermal runaway, a phenomenon caused by a lubricant 's inability to control friction and increased heat under high-stress conditions. By preventing thermal runaway, AMSOIL SEVERE GEAR ™ Gear Lubes inhibit component damage and rapid lubricant degradation.

SEVERE GEAR ™ Synthetic 75W--90 Gear Lube (SVG) replaces Series 2000 Synthetic 75W-90 Gear Lube (TGR).

SEVERE GEAR ™ Synthetic 75W--140 Gear Lube (SVO) replaces Series 2000 Synthetic 75W-140 Gear Lube (TGO).

Long Life Synthetic Gear Lubes (75W-90 & 80W-140)
AMSOIL Long Life Synthetic Gear Lubes are formulated with new and enhanced additives designed specifically for extended drain intervals of up to 500,000 miles in over-the-road trucks. Long Life Synthetic Gear Lubes are engineered to protect gears better than conventional gear oils, resisting acid, carbon and varnish formation and oxidative breakdown. Their superior shear stability allow them to maintain their viscosity during extended service. The enhanced 80W-140 formulation replaces the former 85W-140 formulation, allowing a greater operating range and improved cold temperature performance. AMSOIL Long Life Synthetic Gear Lubes are available in five gallon buckets, excellent for use with lube dispensing pumps.

Long Life Synthetic 75W-90 Gear Lube (FGR) replaces Synthetic 75W-90 Gear Lube (AGR). Long Life Synthetic 80W-140 Gear Lube (FGO) replaces Synthetic 85W-140 Gear Lube (AGO).

80W-90 Synthetic Gear Lube
The 80W-90 gear lube market is mineral oil based. New reformulated AMSOIL 80W-90 Synthetic Gear Lube is designed as a high quality synthetic replacement for mineral gear oils. It is a multifunctional product designed to surpass the requirements of equipment and automotive applications calling for an SAE 80W-90 viscosity grade. Its naturally high viscosity index and shear stable construction provide improved cold temperature performance, while extreme pressure additives provide excellent protection for gears and bearings. AMSOIL 80W-90 Synthetic Gear Lube is competitively priced, making it an excellent choice for cost conscious customers.

* 75W-90 Synthetic vs. Petroleum Gear Oil Testing *
AMSOIL vs Valvoline
(results)

SEVERE GEAR™ Synthetic Extreme Pressure 75W-90 Lubricant

AMSOIL SEVERE GEAR™ Synthetic Extreme Pressure (EP) Lubricants are premium grade lubricants specifically engineered for maximum performance in severe duty applications. These state-of-the-art AMSOIL formulations feature an exclusive blend of high viscosity, shear stable synthetic base oils and an extra treatment of high-performance additives.
Product Code: SVG

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SEVERE GEAR™ Synthetic Extreme Pressure 75W-110 Lubricant

AMSOIL SEVERE GEAR™ Synthetic Extreme Pressure (EP) Lubricants are premium grade lubricants specifically engineered for maximum performance in severe duty applications. These state-of-the-art AMSOIL formulations feature an exclusive blend of high viscosity, shear stable synthetic base oils and an extra treatment of high-performance additives.
Product Code: SVT

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SEVERE GEAR™ Synthetic Extreme Pressure 75W-140 Lubricant

AMSOIL SEVERE GEAR™ provides performance beyond that possible with conventional gear oil. These AMSOIL custom products offer superior gear and bearing protection, better friction and heat reduction, increased efficiency and extended service life.
Product Code: SVO

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SEVERE GEAR™ Synthetic Off-Road and Drag Racing Gear Lubricant SAE 190

Formulated for severe racing conditions and other applications subject to extreme shock loading and pressures.
Product Code: SRN

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SEVERE GEAR™ Synthetic Off-Road and Drag Racing Gear Lubricant SAE 250

Formulated for severe racing conditions and other applications subject to extreme shock loading and pressures.
Product Code: SRT

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SAE 75W-90 Long Life Gear Lube

AMSOIL Long Life Synthetic Gear Lubes are extended drain gear lubes engineered for 500,000-Mile Service Life in Over-The-Road Trucks. The superior cold temperature fluidity and high temperature stability properties of AMSOIL Long Life Synthetic Gear Lubes make them excellent for all-season use. Equipment lasts longer and maintenance costs are reduced with AMSOIL Long Life Synthetic Gear Lubes.
Product Code: FGR

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SAE 80W-140 Long Life Gear Lube

AMSOIL Long Life Synthetic Gear Lubes are extended drain gear lubes engineered for 500,000-Mile Service Life in Over-The-Road Trucks. The superior cold temperature fluidity and high temperature stability properties of AMSOIL Long Life Synthetic Gear Lubes make them excellent for all-season use. Equipment lasts longer and maintenance costs are reduced with AMSOIL Long Life Synthetic Gear Lubes.
Product Code: FGO

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SAE 80W-90 Gear Lube

Provides the long-lasting protection, fuel efficiency and dependability needed for top performance, even in extreme-pressure conditions. Stay fluid in cold temperatures for easy cold-weather shifting. Excellent for use in passenger cars and trucks requiring a GL-5 gear lube, including those with limited slip differentials.
Product Code: AGL

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75W/80W-90 Universal Synthetic Marine Gear Lube

AMSOIL Universal Synthetic Marine Gear Lube is recommended for fresh and salt water applications requiring either 75W-90 or 80W-90 viscosity grade and meeting either API GL-4 or GL-5 performance standards.
Product Codes: AGM

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SAE 80W-90 Marine Lower Unit Gear Lube

Provides outstanding protection to outboard and sterndrive lower units in freshwater and saltwater applications.
Product Codes: ALU, AGT.
Available in 8-oz. tubes (ALU), 1-gallon bottles and 5-gallon pails (AGT)

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Slip-Lock Differential Additive

AMSOIL Slip-Lock Differential Additive is formulated with advanced friction modifiers and is designed to eliminate gear-housing chatter in cars, trucks and SUVs equipped with limited-slip, positraction and locking differentials. It also reduces the banging and clunking associated with automatic locking differentials.
Product Code: ADA

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Series 2000 Chaincase Lubricant

AMSOIL Series 2000 Chaincase Lubricant provides superior protection and performance for enclosed chains. Ideal for snowmobiles, ATVs and general equipment. Extreme pressure additives provide extra wear protection. Extends chain life repels water, and inhibits rust, oxidation and foam. Superior low temperature starting, performance and protection.
Product Code: TCC

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