A multi-functional lubricant 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 SEVERE GEAR® resists thermal breakdown. Its naturally high viscosity index and shear-stable construction improve film strength and viscosity retention. Provides outstanding protection for gears and bearings, resists heat and helps extend equipment life.
Package sizes include:
1-Quart Bottle
1-Quart Bottles (case of 12)
1-Gallon Bottle
1-Gallon Bottles (case of 4)
5-Gallon Pail
16-Gallon Keg
30-Gallon Drums
55-Gallon Drums
AMSOIL SEVERE GEAR® Synthetic EP Gear Lube is excellent for severe applications, such as towing, hauling, steep-hill driving, commercial use, plowing, 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 pick-ups, SUVs, vans and delivery/utility vehicles especially prone to severe service. Other severe-duty vehicles include light, medium and heavy-duty trucks, buses, heavy equipment, 4X4s, tow trucks, race cars, tractors and motor homes.
AMSOIL SEVERE GEAR® Synthetic Extreme Pressure (EP) Gear Lube is a premium-grade gear oil specifically engineered for maximum performance in severe-duty applications. This state-of-the-art AMSOIL formulation features an exclusive blend of high-viscosity, shear-stable synthetic base oils and an extra treatment of high-performance additives. AMSOIL SEVERE GEAR Synthetic EP Gear Lube maintains its 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. AMSOIL SEVERE GEAR helps prevent "thermal runaway" - a phenomenon caused by a lubricant's inability to control friction and increased heat under high-stress conditions. By controlling thermal runaway, AMSOIL SEVERE GEAR Synthetic EP Gear Lube inhibits rapid lubricant degradation and component damage. Equipment runs better and lasts longer with AMSOIL SEVERE GEAR Synthetic EP Gear Lube.
AMSOIL SEVERE GEAR® provides performance beyond that possible with conventional gear oil. This AMSOIL custom product offers superior gear and bearing protection, better friction and heat reduction, increased efficiency and extended service life.
AMSOIL SEVERE GEAR EP Gear Lube excels in hot and cold temperature extremes. By design, it resists breakdown from high heat, preventing acids and carbon/varnish formation. Its wax-free construction also improves cold-flow properties, improving fuel economy and cold-weather shifting.
Some gear lubes fail to meet basic low-temperature requirements. Mobil 1 75W-140 Gear Oil, for example, failed to meet the requirements of the industry standards, AMSOIL SEVERE GEAR®, on the other hand, delivers 20% more cold-temperature protection than the standard requires. It delivers better cold-temperature protection than Mobil 1 and Valvoline SynPower.
• Advanced protection against wear, even with up to 15 percent water contamination 1
• Controls Thermal Runaway
• Protects against rust and corrosion
• Helps reduce operating temperatures
• Maximum efficiency
• Flexible easy-pack for clean, fast installation
• For product service life in differentials, consult your owner's manual or the Original Equipment Manufacturer (OEM) to establish the application, NORMAL or SEVERE.
1 Based upon AMSOIL testing of AMSOIL Synthetic SEVERE GEAR® 75W-90 and Long-Life 75W-90 Synthetic Gear Lube in ASTM 3233 and ASTM D892.
2 Based upon results of samples of Mobil 1 75W-140 and Valvoline SynPower 75W-140 purchased in 2018 and tested in ASTM D2983 by an independent testing facility in May 2018. Samples sent blind to eliminate bias.
* All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are developed by AMSOIL for use in the applications shown.
| . | Normal Service | Severe Service |
| Cars, SUVs, Light Trucks | Drain at 100,000 miles of service or according to the owner's manual, whichever is longer | Drain at 50,000 miles of service or according to the owner's manual, whichever is longer |
| Heavy-Duty Class 8 Line Haul | Follow the OEM drain interval (miles or hours) for synthetic oil up to 250,000 miles or three years, whichever comes first. | |
| Vocational/Delivery | Follow the OEM drain interval (miles or hours) for synthetic oil up to 120,000 miles or three years, whichever comes first. | |
| Heavy Duty Off-Road | Follow the OEM drain interval (miles or hours) for synthetic oil up to 100,000 miles or two years, whichever comes first. | |
For product service life in non-differential applications,consult owner’s manual or the OEM for either normal orsevere synthetic oil service intervals. Where service intervalsare unavailable, drain at twice the interval for conventionaloil.
Gear oils should be changed more frequently when operatingvehicles or equipment in dusty or dirty conditionsunless the gear system is properly sealed and equippedwith membrane type breathers.
Note: AMSOIL does not support extended drain intervalswhere water contamination occurs. Check and service thegear oil frequently when water contamination is possible.
Recommended for use in differentials, manual transmissions and other gear applications requiring any of the following specifications: API GL-5, MT-1, MIL-PRF-2105E, Dana SHAES 234 (Formerly Eaton PS-037), Mack GO-J, or other GL-5 based specifications from vehicle manufacturers, including Ford*, GM* and Chrysler*. Can also be used in axles where an API GL-4 lubricant is recommended.
AMSOIL SEVERE GEAR® (80W-90) provides superior performance and replaces competitors' 80W-90 gear oils. It is formulated to exceed the requirements of front and rear differentials, transfer cases, transaxles, manual transmissions, oil-lubricated wheel bearings and steering gear boxes.
AMSOIL SEVERE GEAR® is compatible with conventionaland synthetic gear oils. Mixing AMSOIL gear oils with otheroils, however, will shorten the oil life expectancy and reducethe performance benefits. AMSOIL does not supportextended drain intervals where oils have been mixed.Aftermarket oil additives, other than those specified byAMSOIL, are not recommended for use with AMSOIL gearoils.
AMSOIL SEVERE GEAR® is compatible with most limited slip differentials. If limited slip differential chatter occurs, add AMSOIL Slip-Lock™ friction modifier additive.
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS).
Click here to view the MSDS Data Sheet for AMSOIL AGL.
Keep out of the reach of children. Don't pollute. Return used oil to collection centers.
| TYPICAL TECHNICAL PROPERTIES AMSOIL SEVERE GEAR® Synthetic Extreme Pressure (EP) 80W-90 | SAE 80W-90 |
| Kinematic Viscosity @ 100°C, cSt (ASTM D-445) | 15.5 |
| Kinematic Viscosity @ 40°C, cSt (ASTM D-445) | 120.2 |
| Viscosity Index (ASTM D-2270) | 135 |
| Brookfield Viscosity, cP (150,000 Max) @-26°C | 46,200 |
| Flash Point °C (°F) (ASTM D 92) | 208 (406) |
| Pour Point °C (°F) (ASTM D 97) | -42 (-44) |
| Copper Corrosion (ASTM D130) @ 121 °C (250°F) / 3hr | 1b |
| Foam Stability (ASTM D-892) | 0/0, 0/0, 0/0 |
Differential & Transfercase can get destroyed if neglected. This tip can help avoid expensive repairs.
Product Name: SEVERE GEAR® 80W-90 (AGL)
Current Rating: 4.88out of 5 stars
Votes & Reviews: 38 vote(s) and 27 user reviews.
Reviewed by Craig: 
Product speaks for it self
Reviewed by MikeB:
I''m going to start towing a camper several times a year and wanted a quality gear oil in the diff and new transmission fluid. After much research I decided on Amsoil and have piece of mind that it will protect just fine.
Reviewed by Bmikk:
I use Amsoil in every engine I have including lawnmowers, farm tractors and my classic cars and have for years. Never had a problem with Amsoil products.
Reviewed by J8:
Awsome product for high performance vehicles
Reviewed by JR:
maintenance
Reviewed by rustystarchamber:
Just did fluid swap in my volvo 240 and love the noise reduction and smoothness of amsoil products. I cant get enough of this stuff.
Reviewed by Steve:
I have been using the Synthetic 80W-90W Gear Lube in the Transmission and Final Drive unit of my 2001 BMW R1150GS motorcycle or years. It never breaks down between changes even though I ride in 1st and 2nd gear for hours on Utah desert roads for hours at a time. shifting is always silky smooth. I highly recommend Amsoil Synthetic Gear Lube wherever the motorcycle specs call for Gear Lube. If your Transmission also houses a "wet clutch" be sure to research the correct Amsoil product to use with a "wet clutch" as there is a special requirement to insure that "wet clutches" won't slip.
We go on two week trips every year on which we average about 5,000 miles and I have had not problems :-)
Reviewed by Cp:
Trans shifts better with amsoil
Reviewed by Freedom Road:
This gear lube doesn't ball up like tar in the cold weather. Better protection and mobility. Great in all diffs, especially with all wheel drive vehicles these days.
Reviewed by Hardy:
I run this in everything from my bush hogs on up. Its hard to beat.
Reviewed by Bc lawn:
Put this in all my gearboxes in rear ends truck got a half a mile per gallon better fuel mileage
Reviewed by Hank:
I use only amsoil oils and fluids in all my 4 wheelers and side by sides
Reviewed by Thoj:
Used this product in a Toyota trans case and rear diff. Ran over 3000+ miles without any problems.
Reviewed by Binor:
I use this Gear Oil in the rear of my 2002 Honda Goldwing. I have used this in my Wing from day 1 and have not had any issues, and would never use anything else.
Reviewed by Big Mike:
I use the lube on a Honda VTX 1300 final drive of the bike has approximately 60,000 miles that was the first change. I am totally satisfied because I don't think I'll ever have to change that again.
Reviewed by RoboRob:
Seems to do the job
Even getting a little better mileage
Reviewed by Rob:
Seems to do the job
Even getting a little better mileage
Reviewed by Librabluuz:
Changed the diff fluids in my jk to this, Dana 44's
Reviewed by Sam:
Use this on gear box on John Deere mower lower heat and great lube
Reviewed by Andriy:
555
Reviewed by Donnie:
I use it for my diffs in my Wrangler that I take off roading allot, amsoil treats me well!!
Reviewed by Michael:
Great
Reviewed by Steven:
Nissan Titan Diff
Reviewed by Keith:
Best I have ever used
Reviewed by David:
Used in my pickup along with an oil change using Amsoil and had an increase in fuel mileage.
Reviewed by Swampy swimmer:
It's a gear oil... I just poured it in about a week ago. Can't really say anything yet. I suppose it does what it should. I actually overfilled the rear differential because my truck was on the hill when I changed the oil, so I wanted to make it right and parked on the leveled surface today and unscrewed the fill plug. About 6 oz of oil came out. I noticed its color and translucency changed after a week of driving. It was noticeably darker. About 150 miles. But to me it means that synthetic stuff cleans the dirt and residue that was left there from my old conventional oil. I might need to do another differential change shortly then I expected. But after that second change - I would leave it alone for a loooong time....
Great Product
Excellent product to keep the rear differential running smooth and cool.