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Signature Series 5W-30 Synthetic Motor Oil

Product code : ASLQT-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-30 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-30 Synthetic Motor Oil



Signature Series 5W-30 Synthetic Motor Oil

  • 5
    High Quality Protection
    By  Capgoat6,  a  Verified Buyer  from  Oakland, California  on  May 06, 2021

    Describe the issue

    Signature Series is the number one oil, proved through testing and comparison, Amsoil is the best protection for your engine.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    High Quality Protection
    By  Capgoat6,  a  Verified Buyer  from  Oakland, California  on  May 06, 2021

    Describe the issue

    Can't get better than Signature Series. Definitely worth the small amount of extra expense for the extra protection.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Great oil
    By  KYLE,  a  Verified Buyer  on  May 02, 2021

    Describe the issue

    First time trying amsoil in my truck. Made the switch from Rotella T6 to Amsoil so far I’m real happy with it definitely is quiet the engine down!
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Amazing product
    By  SHALENDRA,  a  Verified Buyer  from  Citrus heights  on  May 01, 2021

    Describe the issue

    I would recommend Amsoil product to all my friends and relatives. Can never go wrong at all. Huge difference I have noticed since I started using amsoil
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Just rebuilt my engine
    By  Sal,  a  Verified Buyer  on  May 01, 2021

    Describe the issue

    Just rebuilt my first engine..broke her in with 10w30 dino...went 3k with mobile and figure why not? I just a little 1.8 celica gt engine at 183k and realized I just rebuilt an engine and after that I felt she deserved the best. I'm confident after I put in the whole jug that I could run it till the stated 15 to 25k but oem says 6k. I'm confident with amsoil that I'll break 300k no sweat.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Nothing but the Best
    By  Binor,  a  Verified Buyer  from  Cosby, TN  on  May 01, 2021

    Describe the issue

    The day I bought my 2005 F250 home I dumped the stock oil and refilled with Amsoil 0W20 and a EAO11 amsoil filter. That was 16 years ago and it still going strong. I would never use any thing else.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Nothing but the Best
    By  Binor,  a  Verified Buyer  from  Cosby, TN  on  May 01, 2021

    Describe the issue

    I have been using this since the day I bought my Ford Explorer and have never had a problem. Bought the truck home and dumped the stock oil and refilled with Amsoil 5W20 and a Amsoil AEO17 filter that was 3 years ago and will never use anything else.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Best oil on market
    By  LOREN,  a  Verified Buyer  from  Mount pocono, pa  on  May 01, 2021

    Describe the issue

    Have used amsoil in all my vehicles for over 30 years , and have never had problems, if you are trying to decide if you should use amsoil its a no brainer , your car will thank you for years!!
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Great coverage/fast shipping
    By  KOSTANDINO,  a  Verified Buyer  on  April 30, 2021

    Describe the issue

    I used Amsoil ever since I heard of it. Last time I changed my oil was in January 2020 and I just changed it in March 2021. Stuff works great. Shipping was super fast, only a couple days!
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    25 thousand miles
    By  TOM,  a  Verified Buyer  from  Southern Californiia   on  April 29, 2021

    Describe the issue

    This oil has better protection and can be used for 25 thousand miles between changes with the right filter
    Bottom Line
    Yes, I would recommend this to a friend.