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

  Engineered for enthusiasts seeking maximum protection and performance. Precision-formulated with cutting-edge technology and a longstanding devotion to making the world’s best motor oil. The result: engine protection that blows the doors off the highest industry standards.

  See the Product Data Bulletin for full details.

• Technical Specifications
  Data Bulletin

  Data Bulletins (English)

  Data Bulletins (Français)

  Warranty

  WARRANTY

  SDS

  SDS

  SDS (French)

  
  
  
• Product Reviews
  5 star rating

  Based on 7,177 reviews

  Based on 7,177 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Great oil
    By  KEVIN,  a  Verified Buyer  on  October 16, 2026

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    Great oil for high mileage vehicles
    Bottom Line

    Yes, I would recommend this to a friend.
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    YES (0) NO (0)
  • 5 star rating
    Great oil
    By  KEVIN,  a  Verified Buyer  on  October 16, 2026

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    Superior oil for my high mileage truck
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    5W30 full synthetic motor oil
    By  KEVIN,  a  Verified Buyer  from  OH  on  October 15, 2026

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    Good reviews according to the internet for 5W30 full synthetic motor oil
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Great oil
    By  LESLIE,  a  Verified Buyer  from  NV  on  October 14, 2026

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    I drive cross country in a cargo van this oil works great for long intervals between oil changes
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Oil
    By  ANTHONY,  a  Verified Buyer  from  Colorado  on  October 14, 2026

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    Best oil in the buisness. All 8 of my vehicle run amsoil for the protection and peace of mind.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    best oil ever
    By  THOMAS,  a  Verified Buyer  from  New York  on  October 14, 2026

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    best oil ever hands down
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    2020 Dodge Challenger RT
    By  DARRYL,  a  Verified Buyer  on  October 13, 2026

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    I have tried several other oils from all the top brands available. Hemi engines are well known for knocks and ticks. If you want to eliminate those issues. Use AMSOIL. 100% best engine oil on the market. Eliminates all of the engine noises and definitely outperforms all other oil competitors.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Oil that delivers protection
    By  HipHip,  a  Verified Buyer  from  Chicago   on  October 12, 2026

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    I’ve used other brand oils on the vehicle and what happens is after 1,000 miles I have to add about a quart. I use this product and it delivers protection needed that after 2,000 miles I only need to top off 1/4. It’s good stuff, order your oil today.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Best oil for mustangs
    By  BOBBY,  a  Verified Buyer  from  Forest city  on  October 12, 2026

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    This is the best oil you can put in your mustang, V8, v6, ecoboost doesn't matter. The premium oil holds up for so long and you dont feel that horsepower loss when your oil tends to break down. This oil is the best. I've used it in motosports and now my daily mustang.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    A very quiet GM 6.2!
    By  BRADLEY,  a  Verified Buyer  from  Bakersfield   on  October 11, 2026

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    After the first freebie oil change, I switched to the Signature Series! I change the oil and filter when the algorithm hits 50%.
    Bottom Line

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

    YES (1) NO (0)

• Highlights

  A New Level of Motor Oil Technology

  • 75% more engine protection against horsepower loss and wear.¹
  • 50% more cleaning power vs. AMSOIL OE Motor Oil
  • Protects turbochargers 72% better than required² by the GM dexos1 Gen 2 specification.
  • 28% more acid-neutralizing power than Mobil 1.³
  • Trusted by professional engine builders
  • Guaranteed protection for up to 25,000 miles or 1 year

  ¹Based on independent testing of AMSOIL Signature Series 0W-20 using the ASTM D6891 standard test.
  ²Based on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.
  ³Based upon independent testing of Mobil 1 Annual Protection Full Synthetic 5W-30 and AMSOIL Signature Series 5W-30 in ASTM D2896. Oils purchased in July 2020.

• 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

  Engineered for enthusiasts seeking maximum protection and performance. Precision-formulated with cutting-edge technology and a longstanding devotion to making the world’s best motor oil. The result: engine protection that blows the doors off the highest industry standards.

  See the Product Data Bulletin for full details.

• Technical Specifications
  Data Bulletin

  Data Bulletins (English)

  Data Bulletins (Français)

  Warranty

  WARRANTY

  SDS

  SDS

  SDS (French)

  
  
  
• Product Reviews
  5 star rating

  Based on 7,177 reviews

  Based on 7,177 reviews

  See all customer reviews

  Sort by

  Most Recent Most Helpful Highest Rating Lowest Rating Oldest

  • 5 star rating
    Great oil
    By  KEVIN,  a  Verified Buyer  on  October 16, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Great oil for high mileage vehicles
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Great oil
    By  KEVIN,  a  Verified Buyer  on  October 16, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Superior oil for my high mileage truck
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    5W30 full synthetic motor oil
    By  KEVIN,  a  Verified Buyer  from  OH  on  October 15, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Good reviews according to the internet for 5W30 full synthetic motor oil
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Great oil
    By  LESLIE,  a  Verified Buyer  from  NV  on  October 14, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    I drive cross country in a cargo van this oil works great for long intervals between oil changes
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Oil
    By  ANTHONY,  a  Verified Buyer  from  Colorado  on  October 14, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    Best oil in the buisness. All 8 of my vehicle run amsoil for the protection and peace of mind.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    best oil ever
    By  THOMAS,  a  Verified Buyer  from  New York  on  October 14, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    best oil ever hands down
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    2020 Dodge Challenger RT
    By  DARRYL,  a  Verified Buyer  on  October 13, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    I have tried several other oils from all the top brands available. Hemi engines are well known for knocks and ticks. If you want to eliminate those issues. Use AMSOIL. 100% best engine oil on the market. Eliminates all of the engine noises and definitely outperforms all other oil competitors.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Oil that delivers protection
    By  HipHip,  a  Verified Buyer  from  Chicago   on  October 12, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    I’ve used other brand oils on the vehicle and what happens is after 1,000 miles I have to add about a quart. I use this product and it delivers protection needed that after 2,000 miles I only need to top off 1/4. It’s good stuff, order your oil today.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    Best oil for mustangs
    By  BOBBY,  a  Verified Buyer  from  Forest city  on  October 12, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    This is the best oil you can put in your mustang, V8, v6, ecoboost doesn't matter. The premium oil holds up for so long and you dont feel that horsepower loss when your oil tends to break down. This oil is the best. I've used it in motosports and now my daily mustang.
    Bottom Line

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

    YES (0) NO (0)
  • 5 star rating
    A very quiet GM 6.2!
    By  BRADLEY,  a  Verified Buyer  from  Bakersfield   on  October 11, 2026

    Open report issue form

    Describe the issue

    Cancel Submit
    After the first freebie oil change, I switched to the Signature Series! I change the oil and filter when the algorithm hits 50%.
    Bottom Line

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

    YES (1) NO (0)