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AMSOIL Signature Series 5W-50 100% Synthetic Motor Oil

Product code : AMRQT-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 5W-50 100% 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 5W-50 100% Synthetic Motor Oil

Data Bulletin

Warranty

SDS



AMSOIL Signature Series 5W-50 100% Synthetic Motor Oil

  • 5 star rating
    Extra
    By  FRANK,  a  Verified Buyer  from  USA   on  December 07, 2024
    My top off when low . Since these Hemi ‘s run hot. But with ‘‘this oil cooler temps.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Engine oil
    By  JESSE,  a  Verified Buyer  from  Victorville California   on  December 06, 2024
    I wanted to try something new other than the other engine oil company’s . I am very happy with the results I have been seeing and will definitely recommend to anyone that’s wants a change
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Trying it out
    By  JAMES,  a  Verified Buyer  on  December 05, 2024
    Experimenting with Amsoil motor oil, we'll see if it's worth all the hype
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    5-30 sig.
    By  DAN,  a  Verified Buyer  from  Wis.  on  December 05, 2024
    I use it on a 19 ram 24 caddy and 08 corvette altogether about 23 qts so the gallons are more economical and less confusing.I also cut my oil filters for inspecting.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    The Hemi tick.....
    By  JOE,  a  Verified Buyer  from  AZ  on  December 05, 2024
    2012 Ram 1500 Crew Cab that developed the infamous tick. I started using Amsoil in early 2024 and within two oil changes the tick was greatly reduced. It is not a fix by any means, but goes to show what a high quality oil can do for the engine in protecting it.
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  • 5 star rating
    Best oil I have ever used!!
    By  DAVE,  a  Verified Buyer  from  Windsor, Canada  on  November 30, 2024
    It is the best oil I have used. I feel more than confident my twin turbos on my 3.5 eco-boost are well protected. The proof of this occurred when my engine went in for warranty work for leaks and timing chain issues. The manufacturer was suggesting I was not taking care of the engine, but during teardown, the engine was perfectly clean with no trace of varnish. When asked what I use, there were no more questions and the warranty went through! I also find the engine starts and runs quite smoothly during the cold weather months with no loss of oil pressure. Combine this with the Amsoil oil filter, you habve a winning combination to protect your motor!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Good oil
    By  JOE,  a  Verified Buyer  on  November 29, 2024
    My 6.4 hemi runs smooth and quiet with it. Hoping for many miles out of it using amsoil
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Amsoil muy Bueno
    By  MAX,  a  Verified Buyer  from  Rancho  on  November 29, 2024
    Been using Amsoil for 20 years+ exceptionally satisfied
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 4 star rating
    Summary
    By  DAIN,  a  Verified Buyer  on  November 28, 2024
    Thought I was to get a free headlamp which I did not receive. Other than that everything was good
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Q60
    By  OSCAR,  a  Verified Buyer  on  November 28, 2024
    Best oil to put in my car! 10/10
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?