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AMSOIL Signature Series 10W-30 100% Synthetic Motor Oil
Product code : ATMQT-EA
AMSOIL Signature Series 10W-30 100% Synthetic Motor Oil
Product code : ATMQT-EA
Current price:
$17.99
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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. -
We offer easy returns for customers. If your product is unused and unopened, you may return it within 30 days for a full refund of the purchase price. View full AMSOIL Return Policy.
-
We accept Visa, Mastercard, American Express, Discover and PayPal, and provide secure checkout and encrypted payment processing.
About this item
-
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)
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
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.
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.]( "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
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.]( "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.]( "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.]( "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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star rating
OilBy WILSHIRE, a Verified Buyer on June 08, 2026Seems to be good quality oil. I’ve used soil in my motorcycle several times.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Full syntheticBy KARL, a Verified Buyer from Pennsylvania on June 08, 2026The best oil for my HondaBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Signature SeriesBy RONALD, a Verified Buyer from Surrey BC on June 08, 2026I have had other major brand of oils in my 2001 dodge caravan. Amsoil runs the smoothest and less vibrations hands downBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Using Amsoil in all vehiclesBy CHRIS, a Verified Buyer from PA on June 08, 2026I have used Amsoil since the 1990s. use it in my 2020 ram 1500. transmission, diffs, transfer case. use it in my 2017 Cruze 1.4 turbo. use it in my new Nissan 2023 Nissan rogue. great oil. little wear and keeps the motor clean.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Product ReviewBy ROBERT, a Verified Buyer on June 08, 2026Great productsBottom LineNo, I would not recommend this to a friend.Was this review helpful?
-
star rating
Great oil!By JOEL, a Verified Buyer from Indiana on June 07, 2026Awesome products and very fast shipping. Thank you.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
AMSOIL/websiteBy JOSEPH, a Verified Buyer from Corpus Christi on June 07, 2026Always used this product thru the life of my Titan . No issues. Always used this website with no issues whatsoever for all my engine fluids .Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Good OilBy LINDA, a Verified Buyer from Appleton, WI on June 07, 2026I bought your oil. I usually buy the 30 wt. but you didn't have it in the Large container. My oil changing place told me next time buy the 30. Please have it in the large container. Thank you LBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Great products and worth every pennyBy JACK, a Verified Buyer from Oklahoma on June 07, 2026Great products and performs as advertised. For the quality it is worth every penny for the longevity of my vehicle and peace of mind....Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
great productBy ROBERT, a Verified Buyer from CO Colorado on June 06, 2026I have been using this oil for years.Was this review helpful?
-
star rating
Compare Motor Oil
Data Bulletins-
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. -
We offer easy returns for customers. If your product is unused and unopened, you may return it within 30 days for a full refund of the purchase price. View full AMSOIL Return Policy.
-
We accept Visa, Mastercard, American Express, Discover and PayPal, and provide secure checkout and encrypted payment processing.
-
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)
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
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.
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.]( "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
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.]( "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.]( "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.]( "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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-
star rating
OilBy WILSHIRE, a Verified Buyer on June 08, 2026Seems to be good quality oil. I’ve used soil in my motorcycle several times.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Full syntheticBy KARL, a Verified Buyer from Pennsylvania on June 08, 2026The best oil for my HondaBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Signature SeriesBy RONALD, a Verified Buyer from Surrey BC on June 08, 2026I have had other major brand of oils in my 2001 dodge caravan. Amsoil runs the smoothest and less vibrations hands downBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Using Amsoil in all vehiclesBy CHRIS, a Verified Buyer from PA on June 08, 2026I have used Amsoil since the 1990s. use it in my 2020 ram 1500. transmission, diffs, transfer case. use it in my 2017 Cruze 1.4 turbo. use it in my new Nissan 2023 Nissan rogue. great oil. little wear and keeps the motor clean.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Product ReviewBy ROBERT, a Verified Buyer on June 08, 2026Great productsBottom LineNo, I would not recommend this to a friend.Was this review helpful?
-
star rating
Great oil!By JOEL, a Verified Buyer from Indiana on June 07, 2026Awesome products and very fast shipping. Thank you.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
AMSOIL/websiteBy JOSEPH, a Verified Buyer from Corpus Christi on June 07, 2026Always used this product thru the life of my Titan . No issues. Always used this website with no issues whatsoever for all my engine fluids .Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Good OilBy LINDA, a Verified Buyer from Appleton, WI on June 07, 2026I bought your oil. I usually buy the 30 wt. but you didn't have it in the Large container. My oil changing place told me next time buy the 30. Please have it in the large container. Thank you LBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Great products and worth every pennyBy JACK, a Verified Buyer from Oklahoma on June 07, 2026Great products and performs as advertised. For the quality it is worth every penny for the longevity of my vehicle and peace of mind....Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
great productBy ROBERT, a Verified Buyer from CO Colorado on June 06, 2026I have been using this oil for years.Was this review helpful?
-
star rating
