Specifically engineered for extended drain intervals up to 500,000 miles as set by equipment manufacturers for over-the-road trucks and heavy equipment. Provides long life in passenger cars and trucks. Protects against wear and improves equipment life. Excellent "All Season" summer and winter performance. Outperforms all conventional gear oils. Compatible with most limited-slip differentials.
Product 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 heavyduty 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 GL-5 & MT-1, 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 GO-J & GO-J+, Meritor 0-76N (75W-90) & 0-80 (80W-140), and Navistar TMS 6816 plus hypoid gear oil specifications from all foreign and domestic manufacturers such as GM, Ford and Daimler Chrysler. Can also be used in rear axles where API Service GL-4 lubricant is recommended.
Product Description
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. Equipment lasts longer and maintenance costs are reduced with AMSOIL Long Life Synthetic Gear Lubes.
AMSOIL Long Life Synthetic Gear Lubes provide:
• High Load Gear and Bearing Protection
• Reduced Operating Temperatures
• Rust and Corrosion Protection
• Better Cold Weather Shifting
• Improved Efficiency
• Improved Seal Life
HEALTH & SAFETY
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).
Keep out of the reach of children. Don't pollute. Return used oil to collection centers.
TYPICAL
TECHNICAL PROPERTIES
AMSOIL
Long Life Synthetic Gear Lube 75W-90 (FGR)
Kinematic Viscosity
@ 100°C, cSt (ASTM D-445)
15.9
Kinematic Viscosity
@ 40°C, cst (ASTM D-445)
122.6
Viscosity Index
(ASTM D-2270)
138
Brookfield
Viscosity, cP (150,000 Max)
92,325
@ -40°C
Flash Point,
°C (°F) (ASTM D-92) 150°C Min.
212 (414)
Pour Point,
°C (°F) (ASTM D-97)
-51(-67)
Copper Corrosion
(ASTM D-130) 1b Max @ 121 °C (250°F)
/ 3hr
1b
Falex Procedure
B (ASTM D-3233) (failure load, lbf.)
1500
Foam Stability
(ASTM D-892) (20/50/20 maximum)
0/0/0
For product service life in
differentials, consult your owner's manual or
the Original Equipment Manufacturer (OEM) to
establish the application, NORMAL or SEVERE.
NORMAL
SEVERE
Cars,
SUV, 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 500,000 miles or three years, whichever comes first. Otherwise, drain at twice the OEM interval for petroleum oil.
Heavy
Duty
Off-Road Vocational
Follow the OEM drain interval (miles or hours) for synthetic oil up to 120,000 miles or one year, whichever comes first. Otherwise, drain at twice the OEM interval for petroleum oil.
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.
Note: AMSOIL does
not support extended drain intervals where water
contamination occurs. Check and service the
gear oil frequently when water contamination
is possible.
Gear oils should be changed more
frequently when operating vehicles or equipment
in dusty or dirty conditions unless the gear
system is properly sealed and equipped with
membrane type breathers.
AMSOIL LONG LIFE SYNTHETIC
GEAR LUBES are compatible with conventional
gear oils, however mixing oils reduces the benefits
and nullifies the extended service life recommendations.
AMSOIL LONG LIFE SYNTHETIC
GEAR LUBES are compatible with most limited
slip differentials. If limited slip differential
chatter occurs, add AMSOIL Slip-Lock™ friction
modifier additive.
AMSOIL LONG LIFE SYNTHETIC
GEAR LUBE 75W-90 replaces competitors' 75W-90
and 80W-90 viscosity grades
AMSOIL Tech Tips Differential & Transfercase
Differential & Transfercase can get destroyed if neglected. This tip can help avoid expensive repairs.
Did this product meet your expectations?
(click on a star to rate)
Product Name: 75W-90 Semi-Truck Gear Lube (FGR)
Current Rating: 5
out of 5 stars
Total Votes: 34 vote(s)
I have used this product in commercial outdrives for over 10 years. Good life and no broken gears in all those years
Item Reviewed: Long Life Gear Lube (FGR,FGO)
Reviewed by 1blkc5:
awesome stuff
Used it in the rear end of My toyota tacoma seems great can't beat the price compared to severe gear lube .
Item Reviewed: Long Life Gear Lube (FGR,FGO)
Reviewed by Wildman:
Poor Shifting in Cold Weather
I replaced the OEM oil in the manual transmission on a 2014 Subaru Outback at about 60K miles. In the cold weather it was difficult shifting from neutral to first and first to second gears when cold. Shifting improved when the temperature increased after driving several miles. Therefore, I cannot recommend this lubricant for the stated application.
Item Reviewed: Long Life Gear Lube (FGR,FGO)
Reviewed by bacholiver:
Great lube
Has always served me well in all my vehicles, whether its the engine, (gas and diesel) Transmission, or differential. I have lived in Florida and in Minnesota and have always had the flow needed to keep things lubed.
Item Reviewed: Long Life Gear Lube (FGR,FGO)
Reviewed by Stew:
Excellent products I just love them
I run it in everything I own
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by Brian:
I'm a return buyer
I bought this lubricant specifically for my 1962 Ford Galaxie to replace the O.E. 90 weight that was installed in 1962. I've used Amsoil products since 2005 and will never go back to conventional lubricant. Its been good to me all these years and my classic car likes Amsoil too. It has made a big difference for my classic.
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by Farmer:
Love the product
I do a lot of towing with my vechile, from pulling large wagons such as gravity wagons and livestock trailers. I live in colder climates and never have trouble with my engine turning over hard.
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by Speed41u:
Better than OEM
I started using this back in 2008 after speaking to a rep and someone who used the product he sold. I researched all of the findings and found the product to be superior to others.
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by Suzuki Man:
Awesome product
I used it his gear oil for my older 4 door Suzuki sidekick. And can really tell how great it works, quieter running gears, cooler temps. And last a very long time between changes.
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by Jim:
Good products
I like all your products that i have tryed and will buy again
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by Big Rich:
Out performs all other products! Can see the difference
Completly serviced my 2015 GMC Sierria Denali 4x4 and I can tell the difference! Transfer case is smoother! Engine quiter! Gives you a feeling of confidence you can do what the truck is built to do!
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by Mitch:
Good stuff
I use in my Jeep Wrangler, rear differential!
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by nitro:
good products
I believe fully that Amsoil synthetics are the class of the field in all applications , I use their engine and mix oils in my quads and jet ski , so I seen their extended life gear oil I had to get it for my pickup , it might sound like an ad , but , Amsoil is all good stuff 😊
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by Mike:
Gear lube
Worked perfectly....
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by Mike:
Excellent product
Excellent product. The only fluids I use on my car and trucks.
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by Atec:
Best gear oil
Setup gears and lockers for off road use. Always recommend or install Amsoil gear lube after my work is done. Feel very confident in a successful job especially when using this lube.
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by Seth:
Better than off-the-shelf shelf
Use it in our work vehicles. After the discount it's cheaper than any auto store
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by Rich:
Confidence in Amsoil
It's difficult to give a review of a long term oil such as differential lube. But, Amsoil in my 4.2 and my 4.0 Jeep engines was immediately noticed. Jeep in-line 6 motors tend to have valve noise on start up. Totally gone now ! Love that Amsoil ( 10w30). Now switched all 3 Jeeps to Amsoil
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by Steven:
Lang lasting fluid, it does as it's discribed
This really do last a long time and no issues with over 50,000 miles since changing my rear differential and transfer case and the fluid is still clean.
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by David:
Lasts longer than conventional gear oil-worth the extra cost
Put this in my 2wd Tacoma open differential, 10,000 miles so far and no issues. I purchased the premium AMSOIL synthetic product for its superior quality and long service life... will last longer and protect my vehicle better than conventional, so in the long run it's definitely worth the added cost.
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
Reviewed by Slick mike:
Diff fluid for 90 wrangler
I'm 60 years old and have used every possible lubrication known to man, Mail is by far the best.
Item Reviewed: 75W-90 Semi-Truck Gear Lube (FGR)
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