About this item

• Product Overview
  Compare Motor Oil

  Compare Motor Oil

  

  	Signature Series	Extended-Life (XL)	High-Mileage	Hybrid	OE
  Wear Protection
  Engine Cleanliness
  Service Interval
  Extreme Temp Performance
  Corrosion Protection
  Oil-Consumption Control
  Viscosity Control
  Leak Protection
  Severe-Service Protection

  View Full Image

  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 Specifications
  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  
  
  
• Product Reviews
  5 star rating

  Based on 1,465 reviews

  Based on 1,465 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Simply the best.
    By  SARKIS,  a  Verified Buyer  from  Los Angeles  on  July 14, 2026

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    This is only for the people who are planning to use Amsoil for the first time. The people who used it before don’t need to read any reviews.. they know it. This is the best oil by far and it does exactly as the company says. I am using Amsoil for 20 years now on all my cars and never ever had any issues changing my oil every 10 or 25 k miles as recommended.
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (0)
  • 5 star rating
    Show me any better
    By  SARKIS,  a  Verified Buyer  from  Los Angeles  on  July 14, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    I am using only Amsoil oil for the last 20 years and don’t know (or care) if there is anything better or even close to be equal to it.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Amsoil products
    By  DAVID,  a  Verified Buyer  from  Orlando, FL  on  July 09, 2026

    Open report issue form

    Describe the issue

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    I only use Amsoil oil in my vehicles and recommend to all my family
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Great
    By  MICHAEL,  a  Verified Buyer  from  Upstate New York   on  July 07, 2026

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    Great oil, I will never use anything else!
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Awesome Products
    By  BOBBY,  a  Verified Buyer  from  FLORIDA  on  July 01, 2026

    Open report issue form

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    Use Amsoil on all my vehicles and bikes in the Florida heat, and driving conditions it performs great. Highly recommend this product.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Amsoil products
    By  DAVID,  a  Verified Buyer  from  Orlando, FL  on  June 25, 2026

    Open report issue form

    Describe the issue

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    I use Amsoil oil in all my motors and nothing else
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Fantastic as always
    By  MICHAEL,  a  Verified Buyer  from  Indiana  on  June 14, 2026

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    Describe the issue

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    Great product as expected. Been converting everything to Amsoil and can feel the difference in how everything runs. This is especially true in my lawn equipment.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Great stuff
    By  JUSTIN,  a  Verified Buyer  from  Illinois  on  June 14, 2026

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    Another purchase for me. Great product I will continue to use.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Happy Customer
    By  JAMES,  a  Verified Buyer  from  Placerville, CA  on  June 13, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Great products. Quick Delivery. Cases of oil are delivered to my home, I don't have to go to the pars store and lug the case home.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Perfect
    By  COREY,  a  Verified Buyer  from  Alabama   on  June 02, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    The kit is perfect every time. Even comes with gloves. It’s the best oil you can get and never fails me.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)

• Highlights

  • 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.

• Returns

  We offer easy returns for customers. If your product is unused and unopened, you may return it within 30 days for a full refund of the purchase price. View full AMSOIL Return Policy.

• Payments

  We accept Visa, Mastercard, American Express, Discover and PayPal, and provide secure checkout and encrypted payment processing.

• Product Overview
  Compare Motor Oil

  Compare Motor Oil

  

  	Signature Series	Extended-Life (XL)	High-Mileage	Hybrid	OE
  Wear Protection
  Engine Cleanliness
  Service Interval
  Extreme Temp Performance
  Corrosion Protection
  Oil-Consumption Control
  Viscosity Control
  Leak Protection
  Severe-Service Protection

  View Full Image

  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 Specifications
  Data Bulletin

  Data Bulletins

  Warranty

  WARRANTY

  SDS

  SDS

  
  
  
• Product Reviews
  5 star rating

  Based on 1,465 reviews

  Based on 1,465 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Simply the best.
    By  SARKIS,  a  Verified Buyer  from  Los Angeles  on  July 14, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    This is only for the people who are planning to use Amsoil for the first time. The people who used it before don’t need to read any reviews.. they know it. This is the best oil by far and it does exactly as the company says. I am using Amsoil for 20 years now on all my cars and never ever had any issues changing my oil every 10 or 25 k miles as recommended.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Show me any better
    By  SARKIS,  a  Verified Buyer  from  Los Angeles  on  July 14, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    I am using only Amsoil oil for the last 20 years and don’t know (or care) if there is anything better or even close to be equal to it.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Amsoil products
    By  DAVID,  a  Verified Buyer  from  Orlando, FL  on  July 09, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    I only use Amsoil oil in my vehicles and recommend to all my family
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Great
    By  MICHAEL,  a  Verified Buyer  from  Upstate New York   on  July 07, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Great oil, I will never use anything else!
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Awesome Products
    By  BOBBY,  a  Verified Buyer  from  FLORIDA  on  July 01, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Use Amsoil on all my vehicles and bikes in the Florida heat, and driving conditions it performs great. Highly recommend this product.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Amsoil products
    By  DAVID,  a  Verified Buyer  from  Orlando, FL  on  June 25, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    I use Amsoil oil in all my motors and nothing else
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Fantastic as always
    By  MICHAEL,  a  Verified Buyer  from  Indiana  on  June 14, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Great product as expected. Been converting everything to Amsoil and can feel the difference in how everything runs. This is especially true in my lawn equipment.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Great stuff
    By  JUSTIN,  a  Verified Buyer  from  Illinois  on  June 14, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Another purchase for me. Great product I will continue to use.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Happy Customer
    By  JAMES,  a  Verified Buyer  from  Placerville, CA  on  June 13, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Great products. Quick Delivery. Cases of oil are delivered to my home, I don't have to go to the pars store and lug the case home.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)
  • 5 star rating
    Perfect
    By  COREY,  a  Verified Buyer  from  Alabama   on  June 02, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    The kit is perfect every time. Even comes with gloves. It’s the best oil you can get and never fails me.
    Bottom Line

    Yes, I would recommend this to a friend.
    Was this review helpful?

    YES (0) NO (0)