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Signature Series 5W-20 Synthetic Motor Oil

Product code : ALMQT-EA

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.
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, in ASTM D6891 as required by the API SN specification.
2Based on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.

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.
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, in ASTM D6891 as required by the API SN specification.
2Based on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.

Signature Series 5W-20 Synthetic Motor Oil



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.

Fights Engine Wear

  • 75 percent more engine protection against horsepower loss and wear1 than required by the industry standard, extending the life of vital components like pistons and cams.
  • Develops a strong fluid film that keeps metal surfaces separated.
  • Robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life.

1Based on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.


Signature Series Fights Wear

75% more engine protection against horsepower loss and wear.A

Signature Series Fights Wear – 75% more engine protection against horsepower loss and wear.

ABased on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.


Signature Series Fights Viscosity Breakdown

AMSOIL fights viscosity breakdown better than the competition,O providing superior protection of pistons, cams and bearings.

Signature Series Fights Viscosity Breakdown – AMSOIL fights viscosity breakdown better than the competition, proving superior protection of pistons, cams and bearings.

OBased upon independent testing of Mobil 1 Annual Protection Full Synthetic 5W-30, Schaeffer’s Supreme 9000 5W-30, Lucas Synthetic 5W-30, Valvoline Conventional Daily Protection 5W-30, Pennzoil 5W-30 and AMSOIL Signature Series 5W-30 in the Kurt Orbahn test. Oils purchased on 05/03/18.


Signature Series Delivers Powerful Protection

AMSOIL delivers powerful protection. How good is it? An independent lab compared AMSOIL synthetic motor oil head-to-head against a leading competitor in a 100,000-mile test.P AMSOIL provided far superior wear protection and kept bearings looking like new.

Signature Series Delivers Powerful Protection – AMSOIL delivers powerful protection.  How good is it?  An independent lab compared AMSOIL synthetic motor oil head-t-head against a leading competitor in a 100,000-mile test.  AMSOIL provided far superior wear protection and kept bearings looking like new.

PTesting conducted in an independent lab using AMSOIL Signature Series 5W-30 Synthetic Motor Oil and a leading synthetic-blend 5W-30 motor oil in Ford F-150 trucks with 3.5L twin-turbo engines.


Signature Series Protects Against LSPI

AMSOIL Synthetic Motor Oils achieved 100% protection against LSPI.B

Signature Series protects Against LSPI – AMSOIL Synthetic Motor oil achieved 100% protection against LSPI.

Example of piston damage due to an LSPI event observed during the testing of a competitor’s motor oil. The red arrows indicate sections of the ring land that have broken away from the piston.

BBased on zero LSPI events in five consecutive tests of AMSOIL Signature Series, XL and OE 5W-30 Motor Oil in the LSPI engine test required by the GM dexos1 Gen 2 specification.


Signature Series Resists Viscosity Increase

Signature Series is barely challenged by the industry-standard testing, demonstrating only a 0.1% viscosity increase. Even when the test length is doubled, AMSOIL delivered twice the viscosity control required by the standard.GG

Signature Series resists viscosity increase – in industry-standard testing, it demonstrated only 0.1% viscosity increase.

GGBased on independent testing of AMSOIL Signature Series 5W-30 in the Sequence IIIH Engine Test (ASTM D8111), required by the ILSAC GF-6 and API SP specifications.


Keeps Engines Clean

  • Formulated with superior thermal durability that resists breakdown and keeps pistons clean.
  • Controls heat and minimizes performance-robbing deposits.
  • Maximizes engine life and performance.

Helps Keep Engines Cleaner

Signature Series is fortified with a heavy treatment of detergent additives, delivering 28 percent more acid-neutralizing power than Mobil 1* and helping engines stay cleaner, longer.LL

LLBased upon independent testing of Mobil 1 Annual Protection Full Synthetic 5W-30 and AMSOIL Signature Series 5W-30 in ASTM D2896. Oils purchased July 2020.


Signature Series Guards Turbos

Protects turbochargers 72% better than requiredC by the GM dexos1* Gen 2 specification.

Signature Series Guards Turbos – Protects turbochargers 72% better than required by the GM dexos1 Gen 2 specification.

CBased on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.


Signature Series Cleans

Signature Series has 50% more detergentsD to help keep oil passages clean and promote oil circulation. It provides 90% better protection against sludge.DD

Signature Series Cleans – AMSOIL Signature Series Synthetic Motor Oil has 50% more detergents to help keep oil passages clean and promote oil circulation.  It provides 90% better protection against sludge.

The oil pick-up tube screen is virtually free of sludge.

Dvs. AMSOIL OE Motor Oil

DDBased on independent testing of AMSOIL Signature Series 5W-30 in the ASTM D6593 engine test for oil screen plugging as required by the API SN specification.


Signature Series Neutralizes Acids

AMSOIL Signature Series is fortified with a heavy treatment of detergent additive and it delivers 30% more acid neutralizing powerE than Mobil 1,* and 36% more than Royal Purple,* helping engines to stay cleaner, longer.

Signature Series Neutralizes Acids – AMSOIL Signature Series is fortified with a heavy treatment of detergent additive and it delivers 30% more acid neutralizing power than Mobil 1, and 36% more than Royal Purple, helping engines to stay cleaner, longer.

EBased upon independent testing of Mobil 1 Annual Protection 5W-30, Royal Purple High Performance 5W-30, Schaeffer’s Supreme 9000 Full Synthetic 5W-30, Royal Purple High Performance 5W-30, Pennzoil 5W-30, Pennzoil Platinum Full Synthetic 5W-30, Valvoline Conventional Daily Protection 5W-30, Valvoline Full Synthetic Modern Engine 5W-30, Lucas Synthetic 5W-30 and AMSOIL Signature Series 5W-30 in ASTM D2896. Oils purchased 05/03/18


Signature Series Helps Keep Valves Clean

AMSOIL fights volatilityU 38% better than Mobil 1* and 17% better than Royal Purple,* helping reduce oil consumption and keep valves clean.

Signature Series Helps Keep Valves Clean – AMSOIL fights volatility 38% better than Mobil 1 and 17% better than Royal Purple, helping reduce oil consumption and keep valves clean.

UBased on independent testing of AMSOIL Signature Series Synthetic 5W-20, Mobil 1*Advanced Synthetic 5W-20, Royal Purple* High Performance Synthetic 5W-20, Valvoline* Advanced, Pennzoil Platinum*, Valvoline* High Mileage, Mobil 1* Annual Protection, Schaeffer’s* Supreme 9000, Lucas* Oil, Pennzoil (conventional) and Valvoline* Daily Protection (conventional) in ASTM D5800. Oils purchased October-November 2018.


Keeps Pistons Cleaner

Even after doubling the length of the industry-standard test, AMSOIL delivered 40% cleaner pistons than required by the standard.FF

AMSOIL Keeps Pistons Cleaner – Even after doubling the length of the industry-standard test.  AMSOIL delivered 40% cleaner pistons than required by the standard.

FFBased on independent testing of AMSOIL Signature Series 5W-30 in the Sequence IIIH Engine Test (ASTM D8111), required by the ILSAC GF-6 and API SP specifications.


Trusted by Professionals

Dedicated engine builders and mechanics put in long hours honing their craft. These architects of powerful, high-performance engines turn to Signature Series to protect their passion.

Hear what they have to say.

 


 


Signature Series 5W-20 Synthetic Motor Oil



Signature Series 5W-20 Synthetic Motor Oil

  • 5
    Quality Product
    By  JAMES,  a  Verified Buyer  on  October 20, 2021

    Describe the issue

    Excellent service and pricing for a really rather excellent product. I’ve been using this on my 2017 GT350 for 6 months now and it has been brilliant so far.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    There is only one choice
    By  Bman,  a  Verified Buyer  from  North Carolina  on  October 19, 2021

    Describe the issue

    Hello, I have been using Amsoil Signature series ow-20 for my 2017 Toyota Tundra. This oil performs better and last longer than anything else on the market. My truck runs better than new. Oil changes are a breeze and it provides a maximum amount of protection for the engine. I have total confidence whether I'm running at high speed down the interstate or idling in bumper to bumper traffic that the engine is totally protected all of the time. I am definitely a customer for life. I feel that Amsoil has put the time and dedication and research into making a superior product for consumers.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Signature Series 0W-20 Synthetic Motor Oil and Filter
    By  JEFFERY,  a  Verified Buyer  from  Iowa  on  October 19, 2021

    Describe the issue

    Great Oil and Filter. Would not use anything else. Worth the money
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Fine Amsoil product!
    By  JW,  a  Verified Buyer  from  Post, Texas  on  October 19, 2021

    Describe the issue

    Run Amsoil in every vehicle, believe in the protection it gives
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    AMSOIL REVIEW
    By  ADAM,  a  Verified Buyer  from  Orlando, FL  on  October 19, 2021

    Describe the issue

    Amsoil is the bees knees. It really is worth investing in the best synthetic oil money can buy. I've enjoyed an increase in fuel economy, power and peace of mind. I'd recommend switching to anyone.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Yearly oil change
    By  PAMELA A.,  a  Verified Buyer  from  Ohio  on  October 19, 2021

    Describe the issue

    We use the signature series oil because I like the cost effective performance of changing my oil once a year. I drive around 12000 miles a year. Cold weather starts are also better with this product.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Worth the higher price
    By  WALTER,  a  Verified Buyer  on  October 19, 2021

    Describe the issue

    Have a nissan frontier with 353000km ...been using amsoil lubricants and truck runs like a sewing machine!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Great Product
    By  Michael,  a  Verified Buyer  from  AL  on  October 18, 2021

    Describe the issue

    Keeps my engine clean, while lubricating all the necessary parts. I am a big fan of quality products, so what I use in my vehicles is no different. I usually change my oil every 10k miles in my 2016 Power Wagon. I have that confidence because I look at the oil that comes out. Never have I seen or smelled burned oil.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    The BEST!!!
    By  JOE,  a  Verified Buyer  from  Edmonton, Alberta Canada  on  October 18, 2021

    Describe the issue

    I service 7 auto and really like the once a year oil changes. Amsoil has been tested and highly recommended in the Mustang community for its great qualities. I use 5W 20, 5W 30 and 5W 50 exclusively for many years now and very glad I did! The Best oil and filters by far, keep up the great job!!! Joe...
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Outstanding product
    By  Timothy,  a  Verified Buyer  from  Alabama  on  October 18, 2021

    Describe the issue

    The best oil since motor oil🏌🏿‍♂️
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?