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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
    Amazing oil!
    By  BILLY,  a  Verified Buyer  on  June 20, 2021

    Describe the issue

    The absolute best oil I have ever used! I will be using nothing else.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Best oil there is
    By  DAVID,  a  Verified Buyer  from  Michigan.   on  June 18, 2021

    Describe the issue

    Use this in a bunch of different cars year round. Works great! Quiets down the engine compared to name brand oils. Lasts longer, better wear results then big brands. Worth the money! Fantastic oil.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    My truck ran great before but now its incredible
    By  MARC,  a  Verified Buyer  on  June 18, 2021

    Describe the issue

    My truck ran good before but now its great
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Great Lubricant in Winter and Summer
    By  JOSE,  a  Verified Buyer  from  CT  on  June 17, 2021

    Describe the issue

    I use this on a V8 that is supposed to get 10w-60 but I really don’t see a reason for it since that second number shears down fairly quickly. This is quite stable after a year. I only put on 2500 miles annually so it’s nothing.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Only the best
    By  JAMES,  a  Verified Buyer  from  Ontario Canada  on  June 17, 2021

    Describe the issue

    I’ve been running amsoil in my 2019 f-150 2.7L ecoboost since new would would different recommend this to anyone with an Ecoboost engine truck has 90,000km changing the oil ever 8-9k i do about 45,000km a year and this keeps the truck running like new. My last truck 2016 5.0 f-150 had 150,000km on if all on amsoil with no problems
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Great oil
    By  BRODY,  a  Verified Buyer  from  California   on  June 17, 2021

    Describe the issue

    Changed all my oil in the truck to AMS
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    ams oil
    By  JOLY,  a  Verified Buyer  from  san diego  on  June 15, 2021

    Describe the issue

    it's good so I buy it, at least until I find one better... they want a bunch of money for it so if they keep making it good then ill pay. "A" stands for America and if u don't agree then get out.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    2020 Tundra's first oil change
    By  CHRISTOPHER,  a  Verified Buyer  from  Michigan  on  June 15, 2021

    Describe the issue

    I wanted to put the highest quality oil in my truck and only changing it once a year was something I really liked. I changed the oil at 4,000 miles also used the Amsoil filter. Something that I didn't expect is that the engine runs better. It ran good before it's like new with only 4,000 miles. But the engine purrs like a kitten. It's amazing to me that oil could make that kind of a difference. I'm telling everyone.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Very good oil!
    By  TREVOR,  a  Verified Buyer  from  Sioux City, IA 51104  on  June 15, 2021

    Describe the issue

    Use this oil in all my vehicles except old blue which I use 10W-30 which is what the owners manual recommends. I think Amsoil is the top of the line in synthetic oils. Has protected my engines for a few years now.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Great oil
    By  Chowlee,  a  Verified Buyer  from  Sacramento  on  June 15, 2021

    Describe the issue

    My son had not kept an eye on his 94-F150 and ran it out of oil. I found it because the oil gauge dropped to 0 when I accelerated, then back up. After adding 9 quarts of oil it ran like a charm. 2 years later replaced transmission, but engine runs great. I swear by this oil.
    Bottom Line
    Yes, I would recommend this to a friend.