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Signature Series 10W-30 Synthetic Motor Oil

Product code : ATMQT-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.

Warning - Click here for Proposition 65 information for this product

Signature Series 10W-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 10W-30 Synthetic Motor Oil



Signature Series 10W-30 Synthetic Motor Oil

  • 5
    Best Oil
    By  WILLIAM,  a  Verified Buyer  from  Jessup, Maryland  on  August 02, 2021

    Describe the issue

    I was introduced to Amsoil around 40 years ago when a coworker told me about it. He had a SAAB 95 with an amazing amount of mileage, but the car was still running fine. I like the oil because it does a great job of protecting the engine.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Signature Series 0W-40 Synthetic Motor Oil
    By  Lee,  a  Verified Buyer  from  WA  on  August 02, 2021

    Describe the issue

    fast delivery, great price.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    First time buyer
    By  ALLEN,  a  Verified Buyer  from  George   on  August 02, 2021

    Describe the issue

    Am very pleased so far shipping was was not as fast as I thought but understanding bing everything going on I encourage anyone interested in Amsoil products to join the club well worth the money
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Best Oil Hands Down
    By  BRIANNA,  a  Verified Buyer  from  Florida  on  August 01, 2021

    Describe the issue

    Love this oil. I have been using forever and is always my go-to. Definitely recommend
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Best oil
    By  RICHARD,  a  Verified Buyer  from  Spring Hill FL  on  August 01, 2021

    Describe the issue

    I have been using this oil in my vehicles since it has come out with great success. Every vehicle, car, boat, mower has run great, used no oil and was clean when it was changed at required intervals. I recommend its use to everyone.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Best synthetic oil I have used
    By  GREG,  a  Verified Buyer  from  USA   on  August 01, 2021

    Describe the issue

    No complaints about this oil, it lives up to its reputation.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    SS 0 X 20 AMSOIL & EA15K13 Oil Filter
    By  NORMAN,  a  Verified Buyer  from  Hollywood MD.  on  August 01, 2021

    Describe the issue

    I'm not new to Amsoil however, my latest vehicle a 2018 Subaru forester would be considered the newest. I purchased the vehicle new and have always felt totally comfortable providing oil changes for this vehicle every 13 thousand miles driven or 12 months. At replacement the oil visually always looks fine. No buildup of deposits in the oil filter, no thickening of the oil, no foaming or sludge. The Signature Series oil provides 75% more wear protection to assist the high mileage change of the vehicles oil along with the EA15K13 oil filter. I wouldn't push my oil changes to 13 thousand mile's without the use of the EA15K13 oil filter. Without the filter I would most likely replace my oil for this vehicle between 5 - 6 thousand miles.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Clean
    By  MIKE,  a  Verified Buyer  from  Illinois   on  July 31, 2021

    Describe the issue

    I drive 30k miles a year and like the convenience of trusting Amsoil to 25k oil changes. Keeps internal engine clean and clear of varnish deposits like I had with other oils.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Great Products
    By  JENNETTE,  a  Verified Buyer  from  Florida  on  July 31, 2021

    Describe the issue

    Love the amsoil products, always fast delivery too
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    good oil
    By  Mykola,  a  Verified Buyer  from  FL  on  July 31, 2021

    Describe the issue

    After I start use this oil my MPG went up a bit, smoothen engine work and quiet.