AMSOIL Synthetic Gear Lube

More Power, Better Fuel Economy, Less Heat and Better Protection

That’s The Bottom Line.

Read Why Gear Lube Needs to be Changed After Break-in
Gear-LubeBottleModern 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.

AMSOIL Provides the Solution:

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

SVGBigAMSOIL SEVERE GEAR® Synthetic Extreme Pressure Gear Lubes (SAE 75W-90, 75W-110, 75W-140, 190 and 250)
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. (Read AMSOIL TSB (Technical Service Bulletin) DT-2008-3-25. By preventing thermal runaway, AMSOIL SEVERE GEAR® Gear Lubes inhibit component damage and rapid lubricant degradation.

AMSOIL SEVERE GEAR® Synthetic SAE 75W-110 EP Gear Lube provides superior performance and replaces competitors’ 75W-110, 75W-90 and 80W-90 gear oils. It delivers better viscosity protection than SEVERE GEAR® 75W-90 and better fuel efficiency than SEVERE GEAR® 75W-140.

NOTE: AMSOIL SEVERE GEAR® Synthetic Extreme Pressure (EP) Gear Lubes are formulated with a very robust EP additive package and, as a result, usually do not need the addition of any friction modifier additive, even if recommended by the manufacturer (OEM). If limited slip differential chatter still occurs, then add AMSOIL Slip-Lock® Friction Modifier Additive.

 

Thermal-Runways

The extreme loads, pressures and temperatures experienced by modern vehicles place increased stress on gear lubricants that can lead to a serious condition known as Thermal Runaway. As temperatures in the differential climb upward, gear lubricants lose viscosity and load-carrying capacity. When extreme loads and pressures break the lubricant film, metal-to-metal contact and increased heat occur. This increased friction and heat, in turn, results in further viscosity loss, which further increases friction and heat. As heat spirals upward, viscosity spirals downward. Thermal Runaway is a vicious cycle that leads to irreparable equipment damage from extreme wear, and ultimately catastrophic gear and bearing failure.

 

AMSOIL Long Life Synthetic Gear Lubes (SAE 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.

AMSOIL SAE 80W-90 Synthetic Gear Lube
GMCDiFF-Cross-SectionThe 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.

AmsoilGear-lube-recommendation-chart

*Abbreviated version. AMSOIL has optimized gear lube performance for specific operating conditions. However, AMSOIL gear lubes are multi-functional and may be used in many different applications. This chart conveys the best AMSOIL recommendation based on product design and operating environment.

Synthetic Gear Lubes

Read or Download White Paper:
“A Study of Automotive Gear Lubes”

With high viscosity indices, AMSOIL 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.

AMSOIL Synthetic Gear Lubes decrease friction and heat, thus resulting in increased fuel efficiency in addition to extended equipment life and extended drain intervals.

AMSOIL Severe Gear Synthetic SAE 75W-90 Extreme Pressure EP Gear Lube

AMSOIL SEVERE GEAR® Synthetic SAE 75W-140 EP Gear Lube provides all the top performance of AMSOIL SEVERE GEAR® synthetic gear lubes for the heavier SAE 75W-140 viscosity recommended by many equipment manufacturers, especially those covering heavy-duty pickups and other high-stress equipment. This premium lubricant replaces competitors’ 75W-140, 80W-140 and 85W-140 gear oils. Use where maximum viscosity protection is needed for extreme severe-duty applications.

Product Code: SVG

AMSOIL Severe Gear Synthetic SAE 75W-110 Extreme Pressure EP Gear Lube

AMSOIL SEVERE GEAR® 75W-110 fills the gap between the 75W-90 and 75W-140 viscosity gear lubes. This new viscosity grade, 75W-110, offers a high temperature film protection without compromising fuel economy while addressing performance and protection. Designed to provide superior protection for elevated operating temperatures without sacrificing fuel efficiency, it is formulated for use with limited slip clutches and is ideal for turbo diesel pickup trucks, vehicles used for towing and hauling and other vehicles subject to severe service operating conditions, including heavy equipment, construction vehicles, emergency vehicles, street rods and 4×4 vehicles.

Product Code: SVT

AMSOIL Severe Gear Synthetic SAE 75W-140 Extreme Pressure EP Gear Lube

AMSOIL SEVERE GEAR® Synthetic SAE 75W-140 EP Gear Lube provides all the top performance of AMSOIL SEVERE GEAR® synthetic gear lubes for the heavier SAE 75W-140 viscosity recommended by many equipment manufacturers, especially those covering heavy-duty pickups and other high-stress equipment. This premium lubricant replaces competitors’ 75W-140, 80W-140 and 85W-140 gear oils. Use where maximum viscosity protection is needed for extreme severe-duty applications.

Product Code: SVO

AMSOIL 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. For chattering differentials not running AMSOIL Gear Lube, this product is an excellent solution to the problem.

Product Code: ADA

AMSOIL Severe Gear Synthetic Off Road and Drag Racing Gear Lube

Formulated for severe racing conditions and other applications subject to extreme shock loading and pressures, AMSOIL SEVERE GEAR® Synthetic SAE 190 Gear Lubricant is a premium grade, extreme pressure gear lube engineered specifically for the demands of severe racing conditions. Its synthetic formulation provides improved flow over conventional oils, reducing viscous drag and power loss. AMSOIL proprietary extreme pressure additives form an iron-sulfide barrier coating on gear surfaces for the ultimate line of defense against wear, pitting and scoring. AMSOIL SEVERE GEAR® Synthetic SAE 190 Off-Road and Drag Racing Gear Lube protects protects gears from shock loading and tire shake, resists sling-off from G-forces and high speeds, clings to gears, promotes cooler operating temperatures, protects against rust and corrosion, and extends gear and bearing life.

Product Code: SRN

AMSOIL Severe Gear Synthetic SAE 250 Off Road and Drag Racing Gear Lube

“Formulated for severe racing conditions and other applications subject to extreme shock loading and pressures. AMSOIL Severe Gear® Synthetic SAE 250 Gear Lubricant is a premium grade, extreme pressure gear lube engineered specifically for the demands of the most severe racing conditions. It is formulated with shear stable, heavy synthetic base oils for “high film strength” and extra heavy treatments of additives. Its high performance synthetic formulation provides improved flow over conventional oils, reducing viscous drag and power loss. Severe Gear® SAE 250 Gear Lube provide a tough barrier cushion between metal surfaces that absorbs impact. AMSOIL proprietary extreme pressure additives form an iron-sulfide barrier coating on gear surfaces for the ultimate line of defense against wear, pitting and scoring.

Protects gears from shock loading and tire shake
Resists sling-off from G-forces and high speeds
Clings to gears – high pinion style and at steep angles
Promotes cooler operating temperatures
Protects against rust and corrosion
Extends gear and bearing life”

Product Code: SRT

Helpful Differential Change Tips:

  • Flush (drain) as much of the old fluid out as possible
  • Differential fluid capacity depends on ring gear and axle housing size
  • Do not over/under fill differential. This could mean a capacity difference of a quart or more and may cause over heating problems (See the owner’s manual for proper fill level)
  • AMSOIL gear oils are formulated with friction modifiers for limited slip differential applications. There is no need to add limited slip or additional additives
  • After changing the differential fluid, drive the vehicle in 7 or 8 figure eight turns, so new lubricant can work its way into the axle assembly (Important!)

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AMSOIL Universal Hand Pump for Bottles

Fits AMSOIL quart bottles, 1-gallon containers and 2.5-gallon containers. Guarantees efficient, quick dispensing of AMSOIL gear oils, transmission fluids and any oil that may need to be pumped. Great for fluid fills in differentials, transmissions, transaxles, boat lower units and boat sterndrives.

Product Code: G2039

AMSOIL Synthetic 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

AMSOIL Synthetic SAE 80W-140 Long Life Gear Lube

The same benefits of the AMSOIL Synthetic SAE 75W-90 Long Life Gear Lube, except a heavier viscosity. 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!

Product Code: FGO

AMSOIL Synthetic 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. AMSOIL 80W-90 Synthetic Gear Lube is a multi-functional product designed to surpass the requirements of equipment and automotive applications calling for an SAE 80W-90 viscosity grade.

Product Code: AGL

AMSOIL Synthetic SAE 75W-90 Manual Transmission and Transaxle Gear Lube GL-4

AMSOIL Synthetic SAE 75W-90 Manual Transmission and Transaxle Gear Lube meets and exceeds the gear, bearing, synchromesh and seal demands found in automobiles and light trucks. This synthetic lubricant is designed to meet the special requirements of certain manual transmissions and transaxles, such as the New Venture NV4500.

Product Code: MTG

AMSOIL Synthetic Chaincase and Gear Oil

Designed specifically for chaincases and gearcases, AMSOIL Synthetic Chaincase & Gear Oil provides superior protection and performance for enclosed chains and gears found in snowmobiles, ATVs and general equipment. Formulated with extreme-pressure additives, it helps extend chain and gear life through increased wear protection. AMSOIL Synthetic Chaincase & Gear Oil repels water, while also inhibiting rust, oxidation and foam. Its low pour point ensures superior low-temperature starting, reducing drag to deliver maximum power.

Product Code: TCC

Synthetic Marine Gear Lube

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

The high performance lubricant engineered to meet the demands of marine applications. AMSOIL Universal Synthetic SAE 75W/80W-90 Marine Gear Lube provides excellent gear and bearing protection even when contaminated with 10% water, provides reduced friction and wear, excellent rust and corrosion protection, long seal life, and superior foam prevention. It is extreme pressure (EP) additive fortified for superior protection of fast accelerating, high torque/horsepower engines, and protects against shock loading from cavitation of heavily loaded engines.

Product Code: AGM

Synthetic Industrial Gear and Bearing Oils

Synthetic Gear, Bearing and Circulating Oils

AMSOIL Synthetic RC Series R&O/AW Gear and Bearing Oils are formulated with high-quality synthetic base stocks and additive systems that effectively prevent wear and protect equipment by maintaining viscosity, resisting thermal and oxidative breakdown, preventing rust and resisting the degrading effects of water. (RCH, RCI, RCJ, RCK, RCL, RCM, RCN, RCO

Not available for online purchase. Call to Order.

Product Code: RC

AMSOIL Synthetic Extreme Pressure EP Industrial Gear Oils SG Series

AMSOIL Synthetic Extreme Pressure (EP) SG Series Industrial Gear Oils are made from shear-stable, high-quality synthetic base oils and are fortified with additives that deliver high performance in industrial gear applications. These oils are designed to reduce maintenance costs by extending equipment life, extending drain intervals, and protecting against wear, pitting and rust. AMSOIL Synthetic Extreme Pressure (EP) SG Series Industrial Gear Oils are recommended for industrial applications operating under heavy loads and shock conditions and specifying an extreme-pressure lubricant. This includes, but is not limited to, enclosed industrial spur, bevel, herringbone, helical and worm gears (<200º F), chain drives, sprockets and most metal-on-metal systems requiring extreme-pressure additives. The AMSOIL Synthetic SG Series Gear Oils meet the AGMA ratings for synthetic gear oils and EP gear oils and are recommended for use in applications specifying these standards. AMSOIL Synthetic Extreme Pressure (EP) SG Series Industrial Gear Oils are compatible with mineral gear oils, synthetic gear oils (except PAG’s), and seals—making them easy to use.They preserve new seals, prevent leaks, and help rejuvenate old, brittle seals. Available in ISO 100, 150, 200, 320, 460 and 680.

Not available for online purchase. Call to Order.

Product Code: SGK

Fluid Management

AMSOIL Universal Hand Pump for Bottles

Fits AMSOIL quart bottles, 1-gallon containers and 2.5-gallon containers. Guarantees efficient, quick dispensing of AMSOIL gear oils, transmission fluids and any oil that may need to be pumped. Great for fluid fills in differentials, transmissions, transaxles, boat lower units and boat sterndrives.

Product Code: G2039

Fluid Extraction Pump

The G2576 Fluid Extraction Pump aids in the removal of old fluids when servicing vehicles. This high-quality pump can be used to remove old power steering fluid when converting a vehicle to AMSOIL power steering fluid. It can also be used to remove other fluids such as engine oil, drivetrain lubricants and engine coolant.

Product Code: G2576