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AMSOIL Signature Series 5W-30 100% Synthetic Motor OilQuart Bottle
Product code : ASLQT-EA
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AMSOIL Signature Series 5W-30 100% Synthetic Motor OilQuart Bottle
Product code : ASLQT-EA
Current price:
$17.99
Retail Price
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Estimated delivery by Mon, Nov 2
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 LSPI
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
👍By ELVIN, a Verified Buyer from Alabama on October 28, 2026Work greatWas this review helpful?
-
star rating
Only the best for our vehicles.By WAYNE, a Verified Buyer from Lloydminster, Alberta on October 28, 2026This order was for our 2017 KIA Soul EX 2.0 li. Because some of these engines are prone to internal issues, I sought out the best lubrication that I could find. After hours of videos, podcasts and independent test results, Amsoil came out on top by a hefty margin. We switched our 2018 Dodge Grand Caravan Crew Plus over to Amsoil first. A noticeable reduction in start up noise. We noticed the same when we switched the Kia over to Amsoil. I track my fuel mileage on both vehicles. The Kia is primarily used in town, the Dodge is our highway go to. After a very short time, I found our fuel consumption on a highway trip dropped by a steady 1 li/100 kms.. Found the same reduction on the Kia when we ran a long run. I run magnetic oil pan plugs in both vehicles. Both plugs are free of metal traces when pulled for servicing. Yes, Amsoil costs more. But by using both the oil and filters, I think it will payback in engine life. The Kia, because it runs short trips mainly, gets serviced at 7,000 kms. The Dodge at 15,000 kms of highway running. Both vehicles are in a heated garage which makes for warm easy starts when it's -40c outside. I have no plans for trading either vehicle in anytime soon, so I look after them. Amsoil helps me do just that.,Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
New customer just started using it.By PHIL, a Verified Buyer on October 28, 2026I bought 5w-30 signature series because we recently purchased a 2026 Lincoln Aviator with the 3.0 twin turbos. I wanted according to everyone the best synthetic oil i could put in there for protection. My Lincoln only had 2,400 miles on her when I changed over to AmsOil and WIX oil filter. Time will tell.Was this review helpful?
-
star rating
Best oil there isBy ERIC, a Verified Buyer on October 27, 2026Cant beat the qualityBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Engine oilBy TIM, a Verified Buyer from Mustang ok on October 26, 2026As always, excellent products been using their stuff for yearsBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
OilBy CHRIS, a Verified Buyer from Utah on October 26, 2026Awesome ProductBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Signature series 0w40By LARRY, a Verified Buyer from Colorado on October 25, 2026Great product. I have been using Amsoil products in all my vehicles for the last 20 years. Best money can buy.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Sig 0/20By WESS, a Verified Buyer from my office on October 25, 2026Bought o/20 for my 2019 Honda CRV, that using 1 qt per 1000 miles. Car has 102000k miles Recommendation for Honda MTR engineering is to use 5/30 to help reduce oil use in my engine Im gifting the 0/20 to a friend who has a New Honda CRVBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Engine life preserverBy STEVE, a Verified Buyer from Tampa bay on October 25, 2026Amsoil keeps our commercial vehicles rolling unbelievable engine life and performanceBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Oil changeBy CHRISTOPHER, a Verified Buyer from Deleware, my driveway on October 24, 2026Great oil, easy pouring.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 LSPI
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
👍By ELVIN, a Verified Buyer from Alabama on October 28, 2026Work greatWas this review helpful?
-
star rating
Only the best for our vehicles.By WAYNE, a Verified Buyer from Lloydminster, Alberta on October 28, 2026This order was for our 2017 KIA Soul EX 2.0 li. Because some of these engines are prone to internal issues, I sought out the best lubrication that I could find. After hours of videos, podcasts and independent test results, Amsoil came out on top by a hefty margin. We switched our 2018 Dodge Grand Caravan Crew Plus over to Amsoil first. A noticeable reduction in start up noise. We noticed the same when we switched the Kia over to Amsoil. I track my fuel mileage on both vehicles. The Kia is primarily used in town, the Dodge is our highway go to. After a very short time, I found our fuel consumption on a highway trip dropped by a steady 1 li/100 kms.. Found the same reduction on the Kia when we ran a long run. I run magnetic oil pan plugs in both vehicles. Both plugs are free of metal traces when pulled for servicing. Yes, Amsoil costs more. But by using both the oil and filters, I think it will payback in engine life. The Kia, because it runs short trips mainly, gets serviced at 7,000 kms. The Dodge at 15,000 kms of highway running. Both vehicles are in a heated garage which makes for warm easy starts when it's -40c outside. I have no plans for trading either vehicle in anytime soon, so I look after them. Amsoil helps me do just that.,Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
New customer just started using it.By PHIL, a Verified Buyer on October 28, 2026I bought 5w-30 signature series because we recently purchased a 2026 Lincoln Aviator with the 3.0 twin turbos. I wanted according to everyone the best synthetic oil i could put in there for protection. My Lincoln only had 2,400 miles on her when I changed over to AmsOil and WIX oil filter. Time will tell.Was this review helpful?
-
star rating
Best oil there isBy ERIC, a Verified Buyer on October 27, 2026Cant beat the qualityBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Engine oilBy TIM, a Verified Buyer from Mustang ok on October 26, 2026As always, excellent products been using their stuff for yearsBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
OilBy CHRIS, a Verified Buyer from Utah on October 26, 2026Awesome ProductBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Signature series 0w40By LARRY, a Verified Buyer from Colorado on October 25, 2026Great product. I have been using Amsoil products in all my vehicles for the last 20 years. Best money can buy.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Sig 0/20By WESS, a Verified Buyer from my office on October 25, 2026Bought o/20 for my 2019 Honda CRV, that using 1 qt per 1000 miles. Car has 102000k miles Recommendation for Honda MTR engineering is to use 5/30 to help reduce oil use in my engine Im gifting the 0/20 to a friend who has a New Honda CRVBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Engine life preserverBy STEVE, a Verified Buyer from Tampa bay on October 25, 2026Amsoil keeps our commercial vehicles rolling unbelievable engine life and performanceBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Oil changeBy CHRISTOPHER, a Verified Buyer from Deleware, my driveway on October 24, 2026Great oil, easy pouring.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
