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AMSOIL Signature Series 0W-20 100% Synthetic Motor OilQuart Bottle
Product code : ASMQT-EA
New Signature Series is rolling out as inventory of the prior formulation is used up. Orders may include new or previous versions. Both meet our performance standards and deliver the protection you demand.
AMSOIL Signature Series 0W-20 100% Synthetic Motor OilQuart Bottle
Product code : ASMQT-EA
New Signature Series is rolling out as inventory of the prior formulation is used up. Orders may include new or previous versions. Both meet our performance standards and deliver the protection you demand.
Current price:
$17.99
Retail Price
Quart Bottle is temporarily out of stock. Try another available size from the menu above.
Estimated delivery by Mon, Aug 24
to Columbus - 43215.
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A New Level of Motor Oil Technology
- Protects – Ultimate long-life anti-wear protection
- Cleans – Fights sludge and carbon buildup1
- Adapts – Responds to changing conditions
- Performs – Proven beyond the standard2
1Based on Sequence VH and IIIH tests.
2Based on double-length Sequence IIIH test. -
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
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Custom-Built to Outperform
AMSOIL Signature Series 100% Synthetic Motor Oil is formulated for drivers who demand the absolute best engine protection. Built with advanced synthetic base oils and a precision-engineered additive system, it is designed to control wear, resist volatility and maintain viscosity under extreme heat, pressure and cold-start conditions. The result is uncompromising film strength, cleaner components and protection that pushes beyond industry standards into a class of its own. Modern engines place unprecedented stress on motor oil through turbocharging, direct injection, higher temperatures and extended service intervals. Signature Series is engineered to meet those challenges head on, delivering more protection, performance and confidence mile after mile, even during extreme use.
See the Product Data Bulletin for full details.
2X BETTER Protection Against Volatility
AMSOIL Signature Series delivers 2X better protection against volatility,3 helping reduce oil consumption, minimize top-offs and keep engines cleaner over time.
3Based on AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil compared to the API SQ limit using the ASTM D5800 Noack volatility test.
Guards Against
Low-speed pre-ignition (LSPI) remains a serious concern in today’s turbocharged, direct-injection engines, where uncontrolled combustion events can damage pistons and other critical components, especially as motor oil ages. AMSOIL Signature Series 100% Synthetic Motor Oil is engineered to help prevent LSPI by maintaining a strong, stable formulation that continues to deliver outstanding performance throughout the drain interval. Even after 25,000 miles of use, Signature Series delivers 4X more piston protection against LSPI4 than the industry standard requires.
4Using AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil following a 25,000-mile service interval in the Sequence IX aged-oil LSPI test.
Preserves Horsepower and Torque
AMSOIL Signature Series 100% Synthetic Motor Oil is built to help engines run stronger, longer5 – helping to protect engines from performance loss throughout their life.
5Using Signature Series 100% Synthetic 5W-30 Motor Oil in a 2025 Ford F-150 Raptor in a 125K-mile accumulation study. Based on comparative start- and end-of-test horsepower and torque.
Proven Cleaning Power
In Sequence IIIH testing, AMSOIL Signature Series delivers 72% more protection against piston deposits than required by industry standards,6 helping ensure cleaner pistons and consistent performance over time.
6Based on AMSOIL Signature Series 5W-30 in the Sequence IIIH Test.
Even after doubling the length of the Sequence IIIH test, Signature Series provided 31% better protection than required,7 demonstrating its ability to maintain cleanliness far beyond industry standards.
7Based on AMSOIL Signature Series 5W-30 in a double-length Sequence IIIH test.
No Sludge, Just Protection
During a 125K-mile accumulation study on a 2025 Ford F-150 Raptor, the engine experienced 0% oil screen plugging.8
8As demonstrated in a 125K-mile accumulation study on a 2025 Ford F-150 Raptor which had 0% plugging.
-
Performance Studies
Data Bulletin
Warranty
SDS
-
-
star rating
AMSOIL Synthetic oil 0-20By GREGORY, a Verified Buyer from Midwest USA on August 18, 2026The product exceeded my expectations.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
So far so goodBy SAMUEL, a Verified Buyer from NW Connecticut on August 18, 2026Jeep engine seems to run smoother & quieter than before. Wll probably change @ 15K instead of pushing it to 25K. Definitely beats changing oil in December, January or FebruaryWas this review helpful?
-
star rating
2019 Ford Explorer platinum 3.5L dual turbo.By FRANK, a Verified Buyer from Ottawa, Canada on August 18, 2026Slightly better gas mileage. Small tuck,tick engine noise gone. Seems to idle smoother. Like the added protection it gives as gleaned from Ai reviews. Will update review in the winterBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Why something else ?By PAUL, a Verified Buyer from Québec on August 18, 2026This is the best, why settle for less. Lives to its promises.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best Oil I have used!By BRAD, a Verified Buyer from Northern Michigan on August 18, 2026I have used Amsoil products for well over 2 decades and in many different vehicles. They always perform extremely well and are unmatched in their field for providing the best protection for their various uses. I generally buy previously-owned vehicles and use Amsoil from that point forward. It provides longer life for the vehicle and I have a much lower incidence of the need for engine repair.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Don't pass upBy MR10K, a Verified Buyer from INDY on August 18, 2026If your wondering or undecided purchase the product the fits/works with your vehicle it'll be awesome decision. I was told from Jeffy Lude years back that oil doesn't matter LIES. One oil change with AMSOIL will make you wanna slap yo pappy. I've used it on a GMC TERRAIN AND CHRYSLER PACIFICA both notice instance changes in performance my God. I'll never use another brand oil. We'll only in emergency situations. If you purchase the oil but don't install yourself Jeffy will use your own oil if you ask i do it all the time there when I'm feeling lazy.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Excellent OilBy SAM, a Verified Buyer from CA on August 17, 2026Excellent oil and works great for all my vehicles. Just wish they had the oil filters in stock and not on a long back order.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best decisionBy KRISTIN, a Verified Buyer from Kansas City on August 17, 2026I started using this oil just recently and was introduced to it by a coworker. This oil is hands down the best decision I’ve made for maintaining my truck. This product has tremendously improved my gas mileage, and my truck runs so much better. I will be a returning customer for as long as I own vehicles. If you’re on the fence, just do it. You won’t regret the decision. I even started using the oil in my lawn equipment!!!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Unsurpassed excellenceBy Andy, a Verified Buyer from Northern VA on August 16, 2026I am a user of Amsoil products for over 20 years and they always surpass my expectations. Increased mileage and reduced wear. I have no problems running my cars over 150,000 miles without having any mechanical problems. They provide a tremendous return on my investment. Not interested in using any other brand of lubricants for any of my gas powered equipment.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
mrBy THEODORE, a Verified Buyer from 53081 on August 15, 2026awsome productBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Compare Motor Oil
Las Vegas Taxi Cab Field Study-
A New Level of Motor Oil Technology
- Protects – Ultimate long-life anti-wear protection
- Cleans – Fights sludge and carbon buildup1
- Adapts – Responds to changing conditions
- Performs – Proven beyond the standard2
1Based on Sequence VH and IIIH tests.
2Based on double-length Sequence IIIH test. -
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.
-
Custom-Built to Outperform
AMSOIL Signature Series 100% Synthetic Motor Oil is formulated for drivers who demand the absolute best engine protection. Built with advanced synthetic base oils and a precision-engineered additive system, it is designed to control wear, resist volatility and maintain viscosity under extreme heat, pressure and cold-start conditions. The result is uncompromising film strength, cleaner components and protection that pushes beyond industry standards into a class of its own. Modern engines place unprecedented stress on motor oil through turbocharging, direct injection, higher temperatures and extended service intervals. Signature Series is engineered to meet those challenges head on, delivering more protection, performance and confidence mile after mile, even during extreme use.
See the Product Data Bulletin for full details.
2X BETTER Protection Against Volatility
AMSOIL Signature Series delivers 2X better protection against volatility,3 helping reduce oil consumption, minimize top-offs and keep engines cleaner over time.
3Based on AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil compared to the API SQ limit using the ASTM D5800 Noack volatility test.
Guards Against
Low-speed pre-ignition (LSPI) remains a serious concern in today’s turbocharged, direct-injection engines, where uncontrolled combustion events can damage pistons and other critical components, especially as motor oil ages. AMSOIL Signature Series 100% Synthetic Motor Oil is engineered to help prevent LSPI by maintaining a strong, stable formulation that continues to deliver outstanding performance throughout the drain interval. Even after 25,000 miles of use, Signature Series delivers 4X more piston protection against LSPI4 than the industry standard requires.
4Using AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil following a 25,000-mile service interval in the Sequence IX aged-oil LSPI test.
Preserves Horsepower and Torque
AMSOIL Signature Series 100% Synthetic Motor Oil is built to help engines run stronger, longer5 – helping to protect engines from performance loss throughout their life.
5Using Signature Series 100% Synthetic 5W-30 Motor Oil in a 2025 Ford F-150 Raptor in a 125K-mile accumulation study. Based on comparative start- and end-of-test horsepower and torque.
Proven Cleaning Power
In Sequence IIIH testing, AMSOIL Signature Series delivers 72% more protection against piston deposits than required by industry standards,6 helping ensure cleaner pistons and consistent performance over time.
6Based on AMSOIL Signature Series 5W-30 in the Sequence IIIH Test.
Even after doubling the length of the Sequence IIIH test, Signature Series provided 31% better protection than required,7 demonstrating its ability to maintain cleanliness far beyond industry standards.
7Based on AMSOIL Signature Series 5W-30 in a double-length Sequence IIIH test.
No Sludge, Just Protection
During a 125K-mile accumulation study on a 2025 Ford F-150 Raptor, the engine experienced 0% oil screen plugging.8
8As demonstrated in a 125K-mile accumulation study on a 2025 Ford F-150 Raptor which had 0% plugging.
-
Performance Studies
Data Bulletin
Warranty
SDS
-
-
star rating
AMSOIL Synthetic oil 0-20By GREGORY, a Verified Buyer from Midwest USA on August 18, 2026The product exceeded my expectations.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
So far so goodBy SAMUEL, a Verified Buyer from NW Connecticut on August 18, 2026Jeep engine seems to run smoother & quieter than before. Wll probably change @ 15K instead of pushing it to 25K. Definitely beats changing oil in December, January or FebruaryWas this review helpful?
-
star rating
2019 Ford Explorer platinum 3.5L dual turbo.By FRANK, a Verified Buyer from Ottawa, Canada on August 18, 2026Slightly better gas mileage. Small tuck,tick engine noise gone. Seems to idle smoother. Like the added protection it gives as gleaned from Ai reviews. Will update review in the winterBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Why something else ?By PAUL, a Verified Buyer from Québec on August 18, 2026This is the best, why settle for less. Lives to its promises.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best Oil I have used!By BRAD, a Verified Buyer from Northern Michigan on August 18, 2026I have used Amsoil products for well over 2 decades and in many different vehicles. They always perform extremely well and are unmatched in their field for providing the best protection for their various uses. I generally buy previously-owned vehicles and use Amsoil from that point forward. It provides longer life for the vehicle and I have a much lower incidence of the need for engine repair.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Don't pass upBy MR10K, a Verified Buyer from INDY on August 18, 2026If your wondering or undecided purchase the product the fits/works with your vehicle it'll be awesome decision. I was told from Jeffy Lude years back that oil doesn't matter LIES. One oil change with AMSOIL will make you wanna slap yo pappy. I've used it on a GMC TERRAIN AND CHRYSLER PACIFICA both notice instance changes in performance my God. I'll never use another brand oil. We'll only in emergency situations. If you purchase the oil but don't install yourself Jeffy will use your own oil if you ask i do it all the time there when I'm feeling lazy.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Excellent OilBy SAM, a Verified Buyer from CA on August 17, 2026Excellent oil and works great for all my vehicles. Just wish they had the oil filters in stock and not on a long back order.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best decisionBy KRISTIN, a Verified Buyer from Kansas City on August 17, 2026I started using this oil just recently and was introduced to it by a coworker. This oil is hands down the best decision I’ve made for maintaining my truck. This product has tremendously improved my gas mileage, and my truck runs so much better. I will be a returning customer for as long as I own vehicles. If you’re on the fence, just do it. You won’t regret the decision. I even started using the oil in my lawn equipment!!!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Unsurpassed excellenceBy Andy, a Verified Buyer from Northern VA on August 16, 2026I am a user of Amsoil products for over 20 years and they always surpass my expectations. Increased mileage and reduced wear. I have no problems running my cars over 150,000 miles without having any mechanical problems. They provide a tremendous return on my investment. Not interested in using any other brand of lubricants for any of my gas powered equipment.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
mrBy THEODORE, a Verified Buyer from 53081 on August 15, 2026awsome productBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
