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AMSOIL Signature Series 0W-40 100% Synthetic Motor Oil

Product code : AZFQT-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.
  • 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.

AMSOIL Signature Series 0W-40 100% 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 Improves Startup Protection

AMSOIL provides better cold cranking viscosity, helping improve wear protection for engine components at startup.PP

ASTM D5293 cold Crank (Lower = Better)

ASTM D5293 Cold Crank (Lower=Better)

  AMSOIL Signature Series(5W-30) Royal Purple High Performance (5W-30) Lucas (5W-30) Driven LS30 (5W-30) Red Line High Performance (5W-30) Royal Purple HPS (5W-30)
Cranking Viscosity (㎫ ●s) 3800 4500 5000 5750 6100 6100

PPBased on independent third-party testing in the industry-standard ASTM D5293 Cold Crank Simulator test as required by SAE J300.
*Trademark names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.


Signature Series Fights Wear

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

Sequence IVA Engine Test - Lower Number = Less Wear

Sequence IVA Engine Test - Lower Number = Less Wear

  Industry Standard AMSOIL Signature Series 0W-20 Synthetic Motor Oil
Average Cam Wear 90 20.28

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


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.

Test results from AMSOIL against leading competitor in 100,000-mile test.

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

Piston damage due to an LSPI event observed during the testing of a competitor’s motor oil.

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

Sequence IIIH Engine Test - Lower number = better viscosity control

Sequence IIIH Engine Test - Lower number = better viscosity control

  Industry Standard AMSOIL 1X AMSOIL 2X
Viscosity Increase % 100% 0.1% 49.6%

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.


Signature Series Helps Keep Engines Cleaner

  • Fortified with a heavy treatment of detergent additives, delivering 28% more acid-neutralizing power than Mobil 1* and helping engines stay cleaner, longer.LL
  • 50% more detergentsD to help keep oil passages clean and promote oil circulation.
  • Controls heat and minimizes performance-robbing deposits.
  • Superior thermal durability that resists breakdown and keeps pistons clean.
  • Provides 90% better protection against sludge.DD

Oil pick-up tube screen showing it's virtually free of sludge.

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

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.
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 Guards Turbos

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

Part from turbocharger.

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


Keeps Pistons Cleaner

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

Piston 40% cleaner from using AMSOIL.

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.

 

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AMSOIL Signature Series 0W-40 100% Synthetic Motor Oil

Data Bulletin

Warranty

SDS



AMSOIL Signature Series 0W-40 100% Synthetic Motor Oil

  • 5 star rating
    Elite Stuff
    By  Daniel,  a  Verified Buyer  from  Sanford, FL  on  July 14, 2024
    I have a FBO 2019 civic hatch. Even though oem spec is 0w-20 I switched to this since I’m in Florida and pushing more power than stock. This stuff is amazing, When I switched years ago from oem I felt the difference on the very first drive. Will forever use Amsoil SS oil in every vehicle I own!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Amsoil is The Best. #1 With Me.
    By  PHIL,  a  Verified Buyer  on  July 10, 2024
    Many years ago I tried Quaker State and Pennzoil once. Was using Valvoline and came across Lucas Oil Products. I thought that there has to be a better way than combining the Valvoline and Lucas Oil Products when doing an oil change. Was in a Local Auto Parts Store and came across Amsoil. Been a good 20+ years now that I have consistently used just the Amsoil oil. When Amsoil came out with the Signature Series I started using that and always do to this day. My car is a 2003. Since using Amsoil Oil the fluid level on the dipstick has not ever varied. Amsoil is also in my Differentials and in the Same Factory Transmission since 2003. Here we do have the Hot Summers and the Cold Winters. Like it or not here even being on the Highway is more-often-than-not, often stop and go just like being on the surface streets. That is why I have Amsoil fluids in my car purposely when driving is not always smooth steady driving. Thank You. Differential fluid is always right where it was when it was changed and needs to be. Transmission fluid on a very Hot and Humid Day with some Highway and Unfortunately some stop and go city construction driving is right where it should be RIGHT AT FULL HOT. No deviation. Oil Cold is right at the Full mark where it should be and stays.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    A great oil for hybrid cars
    By  ROBERT ,  a  Verified Buyer  from  Sauk Rapids, MN  on  July 10, 2024
    I use this Signature Series 0W-16 oil in my Kia Niro hybrid car because it's the best available. A fast flowing oil is needed for hybrids with the gas engine kicking in and out. My only complaint is that it is not yet available in a one gallon jug. I prefer gallon jugs as both my cars take four quarts during an oil change.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Happy with the product
    By  NOE,  a  Verified Buyer  from  Texas  on  July 09, 2024
    Love the oil, helps engine run smooth.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Simple, as advertised...best synthetics
    By  PATRICK,  a  Verified Buyer  from  LOUISIANA  on  July 08, 2024
    Consistently proven the best synthetic lubricants.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Must have, if you want the best
    By  DAVE,  a  Verified Buyer  from  Oklahoma   on  July 07, 2024
    Got a new to me Ram 2500 and everyone recommended AMSOIL. Went with it and it increased my fuel mileage by about 3 mpg and have had zero issues.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    21 Ranger Tremor
    By  Bill,  a  Verified Buyer  from  WI  on  July 05, 2024
    I have been using AMS OIL in my 21 Ranger Tremor since it was new! Have been getting a consistent 24-26 mpg which is quite more than the estimated. I believe that it is the oil that is giving me the protection and lubrication for the improved mpg!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    My oil Honda pilot
    By  OMAR,  a  Verified Buyer  on  July 05, 2024
    All product AMSOIL they are the best the best tank AMSOIL
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  • 5 star rating
    The best oil
    By  OMAR,  a  Verified Buyer  on  July 05, 2024
    Excelente product in the market
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Best Oil
    By  VLADIMIR,  a  Verified Buyer  from  Orlando   on  July 05, 2024
    Great oil!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?