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SEVERE GEAR® 75W-140

Product code : SVOPK-EA

Advanced protection against wear, even with up to 15 percent water contamination1
Controls thermal runaway
Protects against rust and corrosion
Helps reduce operating temperatures
Long oil, seal & equipment life
1Based upon AMSOIL testing of AMSOIL Synthetic SEVERE GEAR® 75W-90 and Long-Life 75W-90 Synthetic Gear Lube in ASTM 3233 and ASTM D892.

Advanced protection against wear, even with up to 15 percent water contamination1
Controls thermal runaway
Protects against rust and corrosion
Helps reduce operating temperatures
Long oil, seal & equipment life
1Based upon AMSOIL testing of AMSOIL Synthetic SEVERE GEAR® 75W-90 and Long-Life 75W-90 Synthetic Gear Lube in ASTM 3233 and ASTM D892.

SEVERE GEAR® 75W-140



SEVERE GEAR is designed for those who demand the best. Engineered with high film strength for high-load demands. Reduces friction and provides the ultimate protection against wear. Excels in extreme temperatures. Helps maintain efficiency and outperforms conventional gear oils. Excellent for all cars and trucks, but especially well-suited for towing, hauling, racing, commercial use or other severe duty.

See the Product Data Bulletin for full details.

Temperature Extremes

  • Excels in hot and cold temperature extremes.
  • Resists breakdown from high heat, preventing acids and carbon/varnish formation.
  • Wax-free construction also improves cold-flow properties, improving fuel economy and cold-weather shifting.
  • Delivers 20 percent more cold-temperature protection than required by the industry standard.
SEVERE GEAR 75W-90 Synthetic Extreme-Pressure (EP) Gear Lube

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 standard2. SEVERE GEAR, on the other hand, delivers 20 percent more cold-temperature protection than the standard requires.



See the Product Data Bulletin for full details.

2Based 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.

SEVERE GEAR® 75W-140



SEVERE GEAR® 75W-140

  • 5
    Great oil
    By  BRIAN,  a  Verified Buyer  from  Farmington NM  on  September 22, 2021

    Describe the issue

    I purchased this oil to change the front and rear differentials on my 2003 GMC 2500 HD 4 wheel drive pickup. The truck only has 72,000 miles on it but that was the original oil. After changing the oil I definietly noticed that it runs smoother. We will be pulling our 5 th wheel RV and an ATV with it next week so I'm looking forward to seeing how it pulls now. Definitely sold on the Amsoil products I use it in everything we have.
  • 5
    Great product
    By  ADAM,  a  Verified Buyer  from  Yelm, WA  on  September 21, 2021

    Describe the issue

    Highly recommend AMSOIL products, they are second to none. The squeeze bag makes for easy fill in hard to reach places.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Good stuuf
    By  JERRY,  a  Verified Buyer  from  NC  on  September 19, 2021

    Describe the issue

    This stuff is great. I use it in all my Harley transmissions
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Great Gear Oil For My Harley-Davidson
    By  MARK,  a  Verified Buyer  on  September 14, 2021

    Describe the issue

    I have a 2021 Softail Low Rider S Harley-Davidson and I put this in my Primary and Transmission. They work great for the Low gear wine that Harley-Davidson's have when they are very hot and coming to stops in Low gears. I had the Amsoil Primary and Transmission Fluid specifically for the Primary and Transmission but, still could hear a little wine in Low gears when I was coming to a stop. With the 75w 140 Severe Gear Oil in the Primary and Transmission it is so low I can't hear it coming from the Transmission at all anymore. The other upside is with the 75w 140 Severe Gear Oil in the Primary I find Neutral very easy now even on slopes, hills, or uneven ground which I had trouble with all other oils I tried before this one. It's a little pricey but it will be worth it in the long run go ahead and pull that trigger you won't be disappointed. Amsoil Only in my Harley !!!
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Feels great on my 3500HD toweling 20k
    By  CB,  a  Verified Buyer  from  New England  on  September 13, 2021

    Describe the issue

    Bags worked flawlessly, maybe lost a couple ounces but ease of install is worth is. Great replacement for my OEM fluid at 16k
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    So far so good.
    By  DALE,  a  Verified Buyer  from  Ohio  on  September 07, 2021

    Describe the issue

    Have had this in my front and rear differential of my Tundra for about 2-3 months now but so far so good. Even though I've only got 12K on my truck the gear oil in my rear diff appeared to be fairly dirty so I'm glad I went ahead and changed it this soon. The front diff was not bad but change it also to Amsoil.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Works awesome
    By  John,  a  Verified Buyer  from  Minnesota   on  September 07, 2021

    Describe the issue

    Easy squeeze bag is the way to go.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Severe Gear vs Engine Oil for HD Transmissions
    By  ERIC,  a  Verified Buyer  from  Kentucky  on  September 07, 2021

    Describe the issue

    This should be a no-brainer to anyone who wants to keep their transmission functioning properly. If you've ever looked at all the gears, pawls, shafts, bearings, etc. inside a Harley transmission then you understand just how complicated and expensive they can be to repair. Eliminate the repair expense before it bites you in the wallet by ditching The Motor Company's recommended "engine lubricants" inside your transmission. All the parts inside those small transmission housings are pushing 600-1200 lbs. down the highway every time you go for a ride. Why take chances, give all of those parts a fighting chance by using the best lubricant to operate inside that environment. When I change out the Amsoil Severe Gear oil on the bikes I service, I love the way it still looks clean and clear and the drain plug magnet comes out clean after riding 5-10,000 miles. That's the difference between gear oil and engine oil in your transmission. Great product.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Excellent product
    By  REX,  a  Verified Buyer  from  Lewistown, MT.  on  September 06, 2021

    Describe the issue

    Excellent product, replaced the gear lube (AMSOIL 75W-90) that was approximately 9 years old and it came out the same color as when it was new. First time using the Easy Pack and it made it so much easier to fill the differentials and transfer case, definitely will always order the Easy Pack dispenser.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Gear oil easy pack
    By  GREG,  a  Verified Buyer  from  Ottawa  on  September 06, 2021

    Describe the issue

    The easy pack is great for reducing spillage that makes a mess. The gears are quiet and seem to work well.
    Bottom Line
    Yes, I would recommend this to a friend.