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AMSOIL Extended-Life 10W-40 100% Synthetic Motor Oil

Product code : XLOQT-EA

4.9 star rating
Read 1,367 reviews
Read 1,367 reviews

  • 37% more cleaning power1 to help keep your engine running smoother, longer.
  • Protects against LSPI
  • 20,000 miles of guaranteed protection between changes2

1Compared to AMSOIL OE Synthetic Motor Oil.
2Normal Service – Up to 20,000 miles (32,000 km) or one year, whichever comes first, in personal vehicles not operating under severe service.

Product Overview

AMSOIL Extended-Life 10W-40 100% Synthetic Motor Oil



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AMSOIL Extended-Life 100% Synthetic Motor Oil is overbuilt for road warriors so you can confidently drive up to 20,000 miles or one year,2 whichever comes first, between oil changes. A proprietary combination of advanced synthetic base oils and a boosted additive package promotes cleanliness and prolonged engine life. AMSOIL Extended-Life protection delivers peace of mind and convenience.

See the Product Data Bulletin for full details. 

RESISTS OIL BREAKDOWN

  • Maintains viscosity under the most extreme conditions.
  • Reduces excessive oil consumption, engine deposits, accelerated wear and difficult cold starts.

PROTECTS PISTONS FROM LOW-SPEED PRE-IGNITION

  • Features unique chemistry proven to protect your engine against harmful effects of low-speed pre-ignition (LSPI).

KEEPS ENGINES CLEAN

  • Fortified with detergent and dispersant additives.
  • Boosted additive package effectively neutralizes acids and resists sludge, corrosion and carbon deposits.

REDUCES MAINTAINENCE

  • Outstanding protection benefits motorists, business owners and fleet managers.
  • Extended-drain intervals reduce expensive, time-consuming and inconvenient oil changes.
  • Extended drain intervals up to 20,000 miles or one year,2 if you choose, allowing you to change oil on your schedule, reduce maintenance, save money and reduce waste oil.
Technical Specification

AMSOIL Extended-Life 10W-40 100% Synthetic Motor Oil

Data Bulletin

Warranty

SDS



Product Reviews

AMSOIL Extended-Life 10W-40 100% Synthetic Motor Oil

4.9 star rating
Based on 1,367 reviews
Based on 1,367 reviews
See all customer reviews
  • 5 star rating
    Protection that last
    By  HAROLD,  a  Verified Buyer  from  Bismarck MO.   on  April 19, 2025
    I've been using Amsoil since 2012. I've used it in my diesel trucks and now my eco boost. The engine runs smooth and quiet. I find comfort in knowing my turbos will last. I run it in everything I own.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    This car drives 35 miles a day one way
    By  TIGHE,  a  Verified Buyer  from  Pueblo West  on  April 08, 2025
    Great oil no problems just change the oil filter every 3 thousand miles and check your oil level every other day.
    Was this review helpful?
  • 5 star rating
    Awesome as always
    By  Konata,  a  Verified Buyer  from  Canada   on  April 08, 2025
    I have been using AMSOIL on my Honda since brand new and I am sure my engine and transmission will out last the car’s body. When I did valve adjustments at 200k km, the inside of the engine is still looks like new. I will continue to use AMSOIL going forward.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    This stuff is great!
    By  ALEX,  a  Verified Buyer  from  Tempe Arizona  on  April 08, 2025
    This is great oil. Stop messing around with imitation and get in your car.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Good product!
    By  ALAN,  a  Verified Buyer  from  Mcpherson,ks  on  March 31, 2025
    Love amilsoil products been running them in all my vehicles for 5+ years!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 2 star rating
    Good products
    By  JOSHUA,  a  Verified Buyer  from  Earlville, illinois  on  March 29, 2025
    Decent products. Starting to lose interest since having to pay for membership and shipping because my orders are not big enough
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    it’s been great
    By  CHARLIE,  a  Verified Buyer  from  High Ridge MO.  on  March 29, 2025
    My HEMI Ram like all of them have an inherent tick when you first start it up especially if it’s been sitting for 4-5 days but since I have been using Amsoil I haven’t noticed it
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Synthetic Oil
    By  JEFFREY,  a  Verified Buyer  on  March 29, 2025
    The only oil my 1978 Triumph Spitfire will allow. The Best!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Huile parfaite de haute qualité
    By  MAXIME,  a  Verified Buyer  from  Saguenay  on  March 28, 2025
    Très bonne huile de haute qualité j'ai espacer mes vidange avec cette huile
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    AMSOIL PRODUCTS
    By  HAL,  a  Verified Buyer  from  Texas  on  March 19, 2025
    I have been using this product for quite some time now and think that their oil is superior to other brands.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?