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AMSOIL Signature Series 0W-40 100% Synthetic Motor Oil946 ml Bottle
Product code : AZFQTC-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.
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AMSOIL Signature Series 0W-40 100% Synthetic Motor Oil946 ml Bottle
Product code : AZFQTC-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:
$21.89
Retail Price (CAD)
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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.
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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.
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star rating
Excellent qualityBy DAVE, a Verified Buyer from Kapuskasing on September 02, 2026Amsoil products have exceeded my expectations, this is truly high quality engine oil i can trust for myself, and my customers, i am a very picky technician and i expect nothing but the best for my shop & clients! Amsoil products is #1 in my books!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Still The ChampBy Engineer, a Verified Buyer on September 02, 2026I have used this in every Toyota I've ever owned and have almost 300,000 miles on one of them, and you'd barely know thanks to Amsoil. Really superior engine lubrication and protection for long term engine life.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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star rating
Tried & TrueBy Engineer, a Verified Buyer on September 02, 2026I Have been using this in all of my vehicles for 2 decades now and still nothing else beats it. Period. Even with 25,000 miles annual commute, Amsoil shrugs it off. I really miss Amsoil filters though. They were fantastic too!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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star rating
Best protectionBy JOSEPH, a Verified Buyer from Montana on September 02, 2026This oil is amazing I have noticed lower operating temperature and slightly better fuel economy, I have used other Amsoil products and am very impressed with them allBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Excellent product A+By BRYAN, a Verified Buyer from Fl on September 01, 2026A+ productBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
oil for the heatBy DAVID, a Verified Buyer from Florida on September 01, 2026At first I was a little skeptical about going from 5W-30 to 5W-50. I'm glad I did, my truck seems to run better especially during the very hot days we have here in Florida. 96 degrees with the heat index 130 and 100% humidity! Pizza oven temperatures with a dash of moisture. After reading several articles and watching some videos from people who did the same, my engine runs quieter on these hot humid days in paradise where the summer never ends.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Awesome OilBy CURTIS, a Verified Buyer from Abilene, TX on August 31, 2026Perfect oil. Last for a long time. This oil will last through two filter changes and still provide protection.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best fluid to useBy STEVEN, a Verified Buyer from New York on August 31, 2026Quality oil that's a necessity with thinner oils.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
OilBy BRIAN, a Verified Buyer from Indianapolis, IN on August 31, 2026Amsoil is the only oil I use on my Challenger rt. It's a little expensive, but worth every cent.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Amsoil product’sBy CLEVE, a Verified Buyer from Milton on August 30, 2026Never had a problem with my Motors running Amsoil.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
- 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.
-
-
-
star rating
Excellent qualityBy DAVE, a Verified Buyer from Kapuskasing on September 02, 2026Amsoil products have exceeded my expectations, this is truly high quality engine oil i can trust for myself, and my customers, i am a very picky technician and i expect nothing but the best for my shop & clients! Amsoil products is #1 in my books!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Still The ChampBy Engineer, a Verified Buyer on September 02, 2026I have used this in every Toyota I've ever owned and have almost 300,000 miles on one of them, and you'd barely know thanks to Amsoil. Really superior engine lubrication and protection for long term engine life.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Tried & TrueBy Engineer, a Verified Buyer on September 02, 2026I Have been using this in all of my vehicles for 2 decades now and still nothing else beats it. Period. Even with 25,000 miles annual commute, Amsoil shrugs it off. I really miss Amsoil filters though. They were fantastic too!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best protectionBy JOSEPH, a Verified Buyer from Montana on September 02, 2026This oil is amazing I have noticed lower operating temperature and slightly better fuel economy, I have used other Amsoil products and am very impressed with them allBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Excellent product A+By BRYAN, a Verified Buyer from Fl on September 01, 2026A+ productBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
oil for the heatBy DAVID, a Verified Buyer from Florida on September 01, 2026At first I was a little skeptical about going from 5W-30 to 5W-50. I'm glad I did, my truck seems to run better especially during the very hot days we have here in Florida. 96 degrees with the heat index 130 and 100% humidity! Pizza oven temperatures with a dash of moisture. After reading several articles and watching some videos from people who did the same, my engine runs quieter on these hot humid days in paradise where the summer never ends.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Awesome OilBy CURTIS, a Verified Buyer from Abilene, TX on August 31, 2026Perfect oil. Last for a long time. This oil will last through two filter changes and still provide protection.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best fluid to useBy STEVEN, a Verified Buyer from New York on August 31, 2026Quality oil that's a necessity with thinner oils.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
OilBy BRIAN, a Verified Buyer from Indianapolis, IN on August 31, 2026Amsoil is the only oil I use on my Challenger rt. It's a little expensive, but worth every cent.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Amsoil product’sBy CLEVE, a Verified Buyer from Milton on August 30, 2026Never had a problem with my Motors running Amsoil.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
