The Best Synthetic Gear Oil
Synthetic Gear Oil Increases Gas Mileage and Performance
How to Improve Your Gas Mileage Step 9
Synthetic Extreme Pressure Gear Oil
- Increases gas mileage
- Superior protection against friction and wear
- Excellent for high horsepower, hauling and towing
- Better cold weather performance
- Lasts up to 100,000 miles
Formulated for the severe operating conditions of today's pickup trucks, SUVs, sports cars, heavy equipment and other hard working vehicles. Excellent for severe applications, such as towing, hauling, steep hill driving, commercial use, racing, off-road use, rapid acceleration, frequent stop-and-go operation and high ambient temperatures.
Higher horsepower, towing and hauling capabilities of modern vehicles make turbo diesel pickups, SUVs, vans and delivery / utility vehicles especially prone to severe service. Other severe duty vehicles include light, medium and heavy-duty trucks, busses, heavy equipment, 4x4s, tow trucks, race cars, tractors, and motorhomes.
Cost Effective
These superior synthetic gear oils cost a few dollars more but last 2 to 3 times longer and can save you 50% on maintenance. And you can add the savings from better gas mileage on top of that. You get maximum performance, improved fuel economy and lower maintenance costs.
AMSOIL SEVERE GEAR 75W140 replaces 75W140, 80W140 and and 85W140 viscosity grades.
AMSOIL SEVERE GEAR 75W90 replaces 75W90 and 80W90.
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. AMSOIL SEVERE GEAR Synthetic EP Lubricants maintain their viscosity for long-lasting protection against metal-to-metal contact. The proprietary AMSOIL additives form an iron-sulfide barrier coating on gear surfaces, providing the ultimate line of defense against wear, pitting and scoring.
Use in differentials, manual transmissions or other gear applications where one or more of the following standards are specified: API GL-5 & MT-1, MIL-PRF-2105E, Dana SHAES 234 (Formerly Eaton PS-037) for 250,000 miles, Mack GOJ, Arvin / Meritor 0-76M (75W-140), plus hypoid gear oil specifications from all domestic and foreign manufacturers such as GM, Ford and Daimler Chrysler. Can also be used in axles where API Service GL4 lubricant is recommended.
For product service life in differentials, consult your owner's manual or the Original Equipment Manufacturer (OEM) to establish the application, NORMAL or SEVERE.
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NORMAL SERVICE
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SEVERE SERVICE
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Cars, SUVs, Light & Medium Duty Trucks
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Drain at 100,000 miles of service or according to the owner's manual, whichever is longer
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Drain at 50,000 miles of service or according to the owner's manual, whichever is longer
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Heavy Duty Class 8 Line Haul
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Follow the OEM drain interval (miles or hours) for synthetic oil up to 250,000 miles or 3 years, whichever comes first. Otherwise, drain at twice the OEM interval for conventional oil.
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Heavy Duty Off-Road Vocational
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Follow the OEM drain interval (miles or hours) for synthetic oil up to 120,000 miles or 1 year, whichever comes first. Otherwise, drain at twice the OEM interval for conventional oil.
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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. AMSOIL SEVERE GEAR is compatible with most limited slip differentials. If limited slip differential chatter occurs, add AMSOIL Slip-Lock friction modifier additive(see below).
75W90 and 80W140 Long Life Synthetic Gear Oil
AMSOIL Long Life Synthetic Gear Lubes are extended drain gear lubes engineered specifically to last several times longer and protect gears better than all conventional gear oils. These exclusive AMSOIL formulations of premium synthetic base oils and high performance additives resist acid, carbon and varnish formation from oxidative breakdown. Components run cleaner and last longer. AMSOIL Long Life Synthetic Gear Lubes are shear stable and friction reducing. They maintain their viscosity during extended service for maximum wear control and they are fuel-efficient. The superior cold temperature fluidity and high temperature stability properties of AMSOIL Long Life Synthetic Gear Lubes make them excellent for all-season use.
75W-90 80W-140 
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Applications
AMSOIL Long Life Synthetic Gear Lubes, in the correct viscosity grades, are recommended for all domestic and foreign applications such as over-the-road trucks, light, medium and heavy duty trucks, off-road equipment, commercial vehicles, motorhomes, autos, SUVs, emergency vehicles, busses, delivery/utility vehicles and tractors.
Use AMSOIL Extended Drain Synthetic Gear oils in differentials, manual transmissions or other gear applications where one or more of the following standards are specified:
- API GL5 & MT1
- MIL-PRF-2105E
- Dana SHAES 234 (Formerly Eaton PS-037 ) for 250,000 miles
- Dana SHAES 256 (Formerly Eaton PS-163 ) for 500,000 miles
- MACK GOJ & GOJ+,
- Arvin / Meritor 076D
- Meritor 076N (75W-90) & 080 (80W-140)
- Navistar TMS 6816
- Hypoid gear oil specifications from all foreign and domestic manufacturers
- Can also be used in rear axles where API Service GL-4 lubricant is recommended.
80W90 Synthetic Gear Oil
AMSOIL 80W-90 Synthetic Gear Lube is a multifunctional product designed to surpass the requirements of equipment and automotive applications calling for an SAE 80W-90 viscosity grade. Formulated with wax-free synthetic base oils and high quality additives, AMSOIL 80W-90 Synthetic Gear Lube resists thermal breakdown. Its naturally high viscosity index and shear stable construction improves film strength and viscosity retention. AMSOIL Synthetic 80W-90 Gear Lube prevents wear, resists heat, and protects gears. It lasts longer in service than conventional gear oils and increases equipment life.
APPLICATIONS
AMSOIL Synthetic 80W-90 Synthetic Gear Lube is recommended for use in all light and heavy-duty, automotive, commercial or industrial applications requiring SAE 80W-90 EP gear lube. AMSOIL Synthetic 80W-90 Gear Lube replaces all conventional 80W-90 gear oils and exceeds the lubrication and performance requirements of front and rear differentials, transfer cases, transaxles, manual transmissions, oil lubricated wheel bearings, and steering gear boxes that require any of the following specifications:
- API GL-5 & MT-1
- MIL-PRF-2105E
- Dana SHAES 234 (Formerly Eaton PS-037) for 250,000 miles
- MACK GO-J
- Arvin / Meritor 0-76D plus hypoid gear oil specifications from all domestic and foreign manufacturers such as GM, Ford and Daimler Chrysler.
- Can also be used rear axles where API Service GL4 lubricant is recommended
Slip Lock Differential Additive
In some differential applications, a friction modifier additive is necessary to reduce chatter. 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.
AMSOIL Slip-Lock Differential Additive is formulated for use with both synthetic and petroleum gear lubricants and safely replaces manufacturer recommended friction modifiers. Its convenient flip-top dispenser provides quick and easy application to the gear housing. One four-ounce bottle of Slip-Lock treats differential capacities of two to four quarts. It is not for use in automatic transmissions or other applications requiring ATF.
NOTE: AMSOIL Synthetic Gear Lubes do not require the use of this additive. However, not all differentials respond the same and if chatter is noticed, the addition of AMSOIL Slip-Lock will eliminate it. For chattering differentials not running AMSOIL Gear Lube, this product is an excellent solution to the problem.
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