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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
Highly satisfiedBy BRYAN, a Verified Buyer on June 15, 2026185000 miles on a chevy suv and no signs of any issuesBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Great productBy BRYAN, a Verified Buyer on June 15, 2026I have been using amsoil for about 6 years. Car has 225000 miles and my mechanic says still going strongBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
The Best Or NothingBy revmepast9k, a Verified Buyer from Texas on June 15, 2026My vehicle's automaker recommends 5w-30 however I purchase 10w-30 for summer months as Texas gets quite hot. I've been purchasing Amsoil for quite a few number of years now. It is a solid performing product no matter what viscocity or line of product you buy. I will continue buying Amsoil for piece of mind in my vehicles. My title is an accurate reflection of my belief in motor oil (along with everything else in life). Amsoil is the best, period.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
latest AMSOIL orderBy SCOTT, a Verified Buyer on June 15, 2026on this 2016 JKU, we have a Baxter adapter that uses a spin-on filter. Unfortunately , AMSOIL filter wasn't available, and had to purchase the WIX equivalent (was told the mileage rating was the same). Order arrived as scheduled, and oil change is completed. **a side note**, with the Baxter, you'll need an additional 1/2 qt added to your order.Was this review helpful?
-
star rating
The bestBy KARL, a Verified Buyer from Pennsylvania on June 14, 2026The best oil for my RDXBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
One of the best on the marketBy BRIAN, a Verified Buyer from Rio Rancho NM on June 13, 2026Excellent ProductBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Reliable ProductBy JOHN, a Verified Buyer from Olivehurst CA. on June 13, 2026I believe I've used your product for 8+ years and have never been let down by their performance. When dealing with older cars that matter is paramount. I'm keenly interested in you AMSOIL P.I. cleaner for my next purchase. Just to be fair, according the only other I will look at is Techron. As it also has a good track record. PS wish more places carried you product.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
AMSOIL filters.By DONALD, a Verified Buyer on June 12, 2026I am hugely disappointed in the lack of Amsoil oil filters you can order at this time.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
BestBy CHRIS, a Verified Buyer from AZ on June 11, 2026Best engine oil by far, no more ticking and know I know exactly what is going in my engine only the best gold can buyBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
0W-20By DJ, a Verified Buyer from KCMO on June 10, 2026Since I switched gas. I only run this oil now on.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.
-
-
-
star rating
Highly satisfiedBy BRYAN, a Verified Buyer on June 15, 2026185000 miles on a chevy suv and no signs of any issuesBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Great productBy BRYAN, a Verified Buyer on June 15, 2026I have been using amsoil for about 6 years. Car has 225000 miles and my mechanic says still going strongBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
The Best Or NothingBy revmepast9k, a Verified Buyer from Texas on June 15, 2026My vehicle's automaker recommends 5w-30 however I purchase 10w-30 for summer months as Texas gets quite hot. I've been purchasing Amsoil for quite a few number of years now. It is a solid performing product no matter what viscocity or line of product you buy. I will continue buying Amsoil for piece of mind in my vehicles. My title is an accurate reflection of my belief in motor oil (along with everything else in life). Amsoil is the best, period.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
latest AMSOIL orderBy SCOTT, a Verified Buyer on June 15, 2026on this 2016 JKU, we have a Baxter adapter that uses a spin-on filter. Unfortunately , AMSOIL filter wasn't available, and had to purchase the WIX equivalent (was told the mileage rating was the same). Order arrived as scheduled, and oil change is completed. **a side note**, with the Baxter, you'll need an additional 1/2 qt added to your order.Was this review helpful?
-
star rating
The bestBy KARL, a Verified Buyer from Pennsylvania on June 14, 2026The best oil for my RDXBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
One of the best on the marketBy BRIAN, a Verified Buyer from Rio Rancho NM on June 13, 2026Excellent ProductBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Reliable ProductBy JOHN, a Verified Buyer from Olivehurst CA. on June 13, 2026I believe I've used your product for 8+ years and have never been let down by their performance. When dealing with older cars that matter is paramount. I'm keenly interested in you AMSOIL P.I. cleaner for my next purchase. Just to be fair, according the only other I will look at is Techron. As it also has a good track record. PS wish more places carried you product.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
AMSOIL filters.By DONALD, a Verified Buyer on June 12, 2026I am hugely disappointed in the lack of Amsoil oil filters you can order at this time.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
BestBy CHRIS, a Verified Buyer from AZ on June 11, 2026Best engine oil by far, no more ticking and know I know exactly what is going in my engine only the best gold can buyBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
0W-20By DJ, a Verified Buyer from KCMO on June 10, 2026Since I switched gas. I only run this oil now on.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
