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

Product code : XLOQT-EA

4.9 star rating
Read 1,378 reviews
Read 1,378 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 1,378 reviews
Based on 1,378 reviews
See all customer reviews
  • 5 star rating
    As Expected
    By  GREG,  a  Verified Buyer  from  Arizona  on  June 08, 2025
    Just completed my second LOF on my 3.6l Jeep. First fill went 12 months. No leaks, gas mileage didn’t change, and no strange noises. I will continue to use Amsoil.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Simply the best Oil
    By  JASON,  a  Verified Buyer  on  June 06, 2025
    Topnotch fluids. Can't go wrong with AMSOIL. Quality can't be beat.
    Was this review helpful?
  • 5 star rating
    Great motor oil!
    By  WADE,  a  Verified Buyer  from  Houston  on  June 03, 2025
    I use this motor oil for our F150 truck. It has really kept things running smoothly. Life of the oil is great!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    5W20
    By  ABSOLUTE IND,  a  Verified Buyer  on  June 02, 2025
    Have been using Amsoil for over 20 years with great results. Engine runs super quiet, no leaks, good fuel milage. Had my oil changed at dealer once with dealer oil / filter and engine did not run nice and quiet, changed oil back to Amsoil after a short time.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Fantastic Oil
    By  DARREN,  a  Verified Buyer  from  Ontario, Canada  on  May 30, 2025
    I love this oil! I use this exclusively in my daily driver Ford Focus. Since switching to this i have noticed easier starts, particularly in our cold winters and better engine response.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    AMSOIL extended life
    By  TERRY,  a  Verified Buyer  from  Newport NH  on  May 27, 2025
    Works great on my kids vehicles that are always on the go and late on oil change's because they forget to tell Dad when it’s due.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Service car, truck, and motorcycle.
    By  TROY,  a  Verified Buyer  on  May 26, 2025
    Prompt shipping. Very happy with product. This order approximately 275 dollars. Didn't get my free amsoil screw driver.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Awesome
    By  WILLIAM,  a  Verified Buyer  from  Saint Petersburg, Florida  on  May 26, 2025
    Outstanding Transaction
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Only product I trust
    By  Lory,  a  Verified Buyer  from  Texas  on  May 16, 2025
    This is the only oil I trust to put in my Jeep here in Texas. I only drive around 2k miles a year so I am confident that this oil will hold up since I only change it once a year.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Only product I trust
    By  Lory,  a  Verified Buyer  from  Texas  on  May 16, 2025
    This is the only oil I trust to put in my Jeep here in Texas. I only drive around 6k miles a year so I am confident that this oil will hold up since I only change it once a year.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?