AMSOIL SEVERE GEAR® Synthetic
75W-90, 75W- 110 and 75W-140
Extreme Pressure Gear Lubes

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Formulated for the Severe Operating Conditions of Today's Vehicles

AMSOIL SEVERE GEAR® Synthetic 75W-90, 75W-110 and 75W-140 Extreme Pressure (EP) Gear Lubes are formulated for the severe operating conditions of today’s pick-up trucks, SUVs, heavy equipment and other hard-working vehicles. AMSOIL SEVERE GEAR® Gear Lubes provide 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.

• Superior film strength
• Controls "thermal runaway"
• Excellent protection in temperature extremes
• Reduces operating temperatures
• Protects against rust and corrosion
• Improves fuel efficiency
• Keeps gears running efficiently
• Allows improved limited-slip and locking differential performance
• Longer oil, seal and equipment life

Outperforms Conventional Gear Oils

AMSOIL SEVERE GEAR® Synthetic 75W-90, 75W-110 and 75W-140 EP Gear Lubes are premium-grade lubricants specifically engineered for high-demand applications, such as trailer towing, heavy hauling, 4x4 off-road driving, steep hill driving, frequent stop-and-go operation, commercial use and racing. AMSOIL SEVERE GEAR® Gear Lubes outperform all conventional gear oils and are excellent for all types of vehicles, including turbo diesel pick-ups, SUVs, vans, autos, trucks, delivery/utility vehicles, heavy equipment and motor homes. Their superior lube "film strength" and extra additives effectively protect bearings from scoring and wear.

AMSOIL Ahead of the Curve

The automotive industry is not static. With technology constantly improving, vehicle and engine designs change. Today's vehicle line-up is vastly different than it was 10 years ago, with SUVs and trucks representing the fastest growing segment of the U.S. automotive market. In addition, the industry is moving away from front -wheel-drive vehicles, and rear-wheel-drive vehicles are making a strong comeback. The rapidly changing and diversifying vehicle market requires new and improved gear lubricants.

What's Changed?

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 airflow to the differentials.
     A number of factors cause SUV, pick-up 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:

• These vehicles have smaller gears that must handle higher loads per square inch of surface area

• Their smaller sump sizes (and lower volume of gear lube) cannot dissipate heat as well as larger sump sizes

• Air flow is significantly reduced compared to over-the-road trucks

• 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. 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, allowing improved limited-slip and locking differential performance. AMSOIL SEVERE GEAR® Synthetic 75W-90, 75W-110 and 75W-140 EP Gear Lubes maintain their viscosity, providing an extra level of protection at high temperatures and a longer service life.

Outstanding Friction Control

The extra additives in AMSOIL SEVERE GEAR® Synthetic 75W-90, 75W-110 and 75W-140 EP Gear Lubes 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 rapid lubricant degradation and component damage. Equipment runs better and lasts longer with AMSOIL SEVERE GEAR® Gear Lubes.

Superior High- and Low-Temperature Performance

AMSOIL SEVERE GEAR® Synthetic 75W-90, 75W-110 and 75W-140 EP Gear Lubes excel in hot- and cold-temperature extremes. By design, they resist breakdown from high heat, preventing acids and carbon/varnish formation, and they significantly outperform conventional petroleum lubes in cold temperatures. The wax-free construction of AMSOIL SEVERE GEAR® Gear Lubes allows them to stay fluid in cold temperatures, providing the immediate lubrication components need during start-up. At a temperature of 0°F, conventional lubricants may take as long as 18 minutes to flow and lubricate the front pinion bearing of a differential, while AMSOIL 75W-90 is flowing in as little as 45 seconds, allowing for easier cold-weather shifting, significantly better wear protection and improved fuel economy.

Rust and Corrosion Protection and Seal Compatibility

AMSOIL SEVERE GEAR® Synthetic 75W-90, 75W-110 and 75W-140 EP Gear Lubes provide a durable, protective film on components to prevent the formation of rust and corrosion. They also increase seal life and reduce oil leakage due to pressure build-up. They are compatible with the materials used to make seals and will not cause excessive swelling, shrinkage or hardening.

Compatible with Most Limited-Slip Differentials

AMSOIL SEVERE GEAR® Synthetic 75W-90, 75W-110 and 75W-140 EP Gear Lubes are compatible with most limited-slip differentials. If limited-slip differential chatter occurs, add AMSOIL Slip-Lock friction modifier additive.

Extended Service Life

AMSOIL SEVERE GEAR® Synthetic 75W-90, 75W-110 and 75W-140 EP Gear Lubes have a longer service life than conventional gear lubes do.
 

Recommended Oil Drain Intervals for
AMSOIL SEVERE GEAR® Synthetic 75W-90, 75W-110 and 75W-140 EP Gear Lubes*

Severe Service

For product service life in differentials, consult your owner’s manual or the OEM to establish the application, NORMAL or SEVERE. For product service life in non-differential applications, consult owner's manual or the OEM for either normal or severe synthetic oil service intervals. Where service intervals are unavailable, drain at twice the interval for conventional oil.

Applications

AMSOIL SEVERE GEAR® Synthetic 75W-90, 75W-110 and 75W-140 EP Gear Lubes, in the correct viscosity grades, are recommended for use in all types of vehicles, including turbo diesel pick-ups, SUVs, vans, autos, trucks, delivery/utility vehicles, heavy equipment and motor homes. They are engineered for high demand applications such as trailer towing, heavy hauling, 4X4 off-road driving, steep hill driving, frequent stop-and-go operation and operating in high ambient temperatures. They are also recommended for use in light-, medium- and heavy-duty trucks, buses, heavy equipment, tow trucks, and tractors.
     Use AMSOIL SEVERE GEAR® Gear Lubes in differentials, manual transmissions or other gear applications requiring the performance specifications listed on the AMSOIL corporate website (see below). They can also be used in rear axles where API Service GL-4 lubricant is recommended.

Performance Specifications

AMSOIL SEVERE GEAR® Synthetic 75W-90, 75W-110 and 75W-140 EP Gear Lubes meet or exceed specific performance standards of various domestic and foreign manufacturers. Please visit the AMSOIL Corporate website for an up-to-date listing for 75W-90 (SVG), 75W-110 (SVT) or 75W-140 (SVO).

AMSOIL Gear Lube Recommendation Chart

AMSOIL has optimized gear lube performance for specific operating conditions:

• AMSOIL Long-Life Synthetic 75W-90 and 80W-140 Gear Lubes (FGO and FGR) have a performance emphasis on 500,000 mile extended drain intervals associated with larger sumps and lower operating temperatures of over-the-road truck differentials.

• AMSOIL SEVERE GEAR® Synthetic 75W-90, 75W-110 and 75W-140 Gear Lubes (SVG, SVT and SVO) have a performance emphasis on the extreme pressure and high heat of today’s vehicle differentials.

• AMSOIL Synthetic 80W-90 Gear Lube (AGL) is for those customers requiring this specific viscosity grade.

However, AMSOIL gear lubes are multi-functional and may be used in many different applications, as shown in the chart below. This chart conveys the best AMSOIL gear lube recommendation for each application, based on product design and operating environment, and is listed by it's rating for each application: first (offers superior performance), second (offers excellent performance), and third (exclusive to SAE 80W-90). (Please note: This chart was produced before AMSOIL SEVERE GEAR® Synthetic 75W-110 Gear Lube was developed, therefore SVT is not listed on this chart.)
 

Chart Notes:

• AMSOIL 75W-90 Synthetic Gear Lubes (FGR and SVG) will outperform conventional 75W-90 and 80W-90 gear oils in all applications and may be used as a replacement

• AMSOIL 75W-140 (SVO) Synthetic Gear Lube will outperform conventional 75W-140, 80W-140 and 85W-140 gear oils and may be used as a replacement

• AMSOIL offers 80W-90 (AGL) synthetic gear lube for those customers requiring this specific viscosity grade

Additional Notes: AMSOIL SEVERE GEAR® Synthetic 75W-110 (SVT) Synthetic Gear Lube will outperform conventional 75W-110, 75W-90 and 80W-90 gear oils and may be used as a replacement. AMSOIL SEVERE GEAR® Synthetic 75W-110 (SVT) delivers better viscosity protection than AMSOIL SEVERE GEAR® Synthetic 75W-90 (SVG) and better fuel efficiency than AMSOIL SEVERE GEAR® Synthetic 75W-140 (SVO).

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