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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
Oil and wix xp filterBy ANTHONY, a Verified Buyer from Rockford Illinois on July 23, 2026Love the oil not so much the filter.I really wish you guys would get the amsoil ea17 filter back in stock, its been far to long they've been on back order.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
AMSOIL SAE 5W30 100% synthetic motor oilBy RONALD, a Verified Buyer from Phoenix, AZ on July 23, 2026I have used this product in my 2000 Camry since 2004 (odometer: 71,000) until the present time (odometer 328,000 +) and in my 2006 Camry since May, 2025. I don't think that there is a better oil made! (By the way, I usually change the oil filter--I use the WIX oil filters--every 6 months.)Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
So far so goodBy LARRY, a Verified Buyer from MO on July 23, 2026I have done oil samples and after next test it should be a very informative resultBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
oil for every vehicleBy BRODERICK, a Verified Buyer on July 22, 2026From my 67 chevelle to my 2024 GMC Sierra my wife's car and the kids this oil has me coveredBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
2850000By HERBERT, a Verified Buyer from La on July 22, 2026I have used it in my f150 with 2.7 got 285000 on my truck with no engine problems what so ever.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Great oil companyBy MANNY, a Verified Buyer from Fayetteville NC on July 22, 2026I always put Amsoil in all my vehicles and I highly recommend oil the 0/20 signature series is the best on the market never had a problem with any of my vehicles using AmsoilBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Better product i ever boughtBy SERGE, a Verified Buyer from Quebec canada on July 21, 2026Iam gone stay a amsiol fan foreverBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Better than the dealership providesBy SETH, a Verified Buyer from Texhoma on July 21, 2026Great oil is the one thing I can rely on when the auto manufacturers keep reducing their oil viscosity to achieve fuel efficiency for some tree hugging politician.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
25 elantra nBy JERALD, a Verified Buyer on July 21, 2026Read all the reviews , watched all the videos, it's the only oil I'll trust in my carBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
The Only Truly Fully Synthetic Motor OilBy WILSON, a Verified Buyer from 5929 woodland ave on July 20, 2026Whether viewed in terms of quiet operation or evaporation loss, it stands alone—no other product can hold a candle to it.Bottom LineYes, I would recommend this to a friend.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
Oil and wix xp filterBy ANTHONY, a Verified Buyer from Rockford Illinois on July 23, 2026Love the oil not so much the filter.I really wish you guys would get the amsoil ea17 filter back in stock, its been far to long they've been on back order.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
AMSOIL SAE 5W30 100% synthetic motor oilBy RONALD, a Verified Buyer from Phoenix, AZ on July 23, 2026I have used this product in my 2000 Camry since 2004 (odometer: 71,000) until the present time (odometer 328,000 +) and in my 2006 Camry since May, 2025. I don't think that there is a better oil made! (By the way, I usually change the oil filter--I use the WIX oil filters--every 6 months.)Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
So far so goodBy LARRY, a Verified Buyer from MO on July 23, 2026I have done oil samples and after next test it should be a very informative resultBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
oil for every vehicleBy BRODERICK, a Verified Buyer on July 22, 2026From my 67 chevelle to my 2024 GMC Sierra my wife's car and the kids this oil has me coveredBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
2850000By HERBERT, a Verified Buyer from La on July 22, 2026I have used it in my f150 with 2.7 got 285000 on my truck with no engine problems what so ever.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Great oil companyBy MANNY, a Verified Buyer from Fayetteville NC on July 22, 2026I always put Amsoil in all my vehicles and I highly recommend oil the 0/20 signature series is the best on the market never had a problem with any of my vehicles using AmsoilBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Better product i ever boughtBy SERGE, a Verified Buyer from Quebec canada on July 21, 2026Iam gone stay a amsiol fan foreverBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Better than the dealership providesBy SETH, a Verified Buyer from Texhoma on July 21, 2026Great oil is the one thing I can rely on when the auto manufacturers keep reducing their oil viscosity to achieve fuel efficiency for some tree hugging politician.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
25 elantra nBy JERALD, a Verified Buyer on July 21, 2026Read all the reviews , watched all the videos, it's the only oil I'll trust in my carBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
The Only Truly Fully Synthetic Motor OilBy WILSON, a Verified Buyer from 5929 woodland ave on July 20, 2026Whether viewed in terms of quiet operation or evaporation loss, it stands alone—no other product can hold a candle to it.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
