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AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil
Product code : ASLQT-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 5W-30 100% Synthetic Motor Oil
Product code : ASLQT-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
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Estimated delivery by Sat, Aug 1
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.
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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
Best oil out thereBy JAMMIE, a Verified Buyer from Florida on July 28, 2026I would say best oil I’ve bought in a long time would recommend to everyoneBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Signature SeriesBy SCOTT, a Verified Buyer on July 28, 2026If any of my gasoline vehicles require synthetic oil 5w-30 signature series is what it gets no matter what the manufacturer says. It’s never let me down and it won’t! Great oil!!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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star rating
BEST OILBy MICHAEL, a Verified Buyer from OHIO on July 28, 2026Best oil on the planet. I run AMSOIL fluids and filters in all my vehicles. 👍👍Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Quality oilBy LOWELL, a Verified Buyer from Florida on July 28, 2026Great customer service, quick shipping and a quality productBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
QualityBy REMI, a Verified Buyer from Odessa tx. on July 27, 2026Very good product quality.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
High Quality OilBy VICTOR, a Verified Buyer from Las Cruces Nm on July 27, 2026⭐⭐⭐⭐⭐ Excellent products! The AMSOIL engine oil keeps my engine running smooth and quiet, and the oil filter is high quality and provides great protection. I’ve had a great experience with both and highly recommend them.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best Motor Oil EverBy JAMES, a Verified Buyer from Orlando on July 27, 2026Ordered and picked up the same day - could have had it delivered but i was in a hurry. I use it in all my cars and trucks for the last 15 years and I never have to worry about my engines.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
civic siBy ADRIAN, a Verified Buyer on July 26, 2026Just the right amount of oil I need for the vehicleBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best product to protect your investmentBy DAVID, a Verified Buyer from Chicora PA on July 26, 2026Best product to protect your investment In the long haul HANDS DOWN!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
5 30 syntheticBy BARRY, a Verified Buyer from Hazletownship Pennsylvania on July 26, 2026Great product and great Customer serviceBottom 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.
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-
star rating
Best oil out thereBy JAMMIE, a Verified Buyer from Florida on July 28, 2026I would say best oil I’ve bought in a long time would recommend to everyoneBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Signature SeriesBy SCOTT, a Verified Buyer on July 28, 2026If any of my gasoline vehicles require synthetic oil 5w-30 signature series is what it gets no matter what the manufacturer says. It’s never let me down and it won’t! Great oil!!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
BEST OILBy MICHAEL, a Verified Buyer from OHIO on July 28, 2026Best oil on the planet. I run AMSOIL fluids and filters in all my vehicles. 👍👍Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Quality oilBy LOWELL, a Verified Buyer from Florida on July 28, 2026Great customer service, quick shipping and a quality productBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
QualityBy REMI, a Verified Buyer from Odessa tx. on July 27, 2026Very good product quality.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
High Quality OilBy VICTOR, a Verified Buyer from Las Cruces Nm on July 27, 2026⭐⭐⭐⭐⭐ Excellent products! The AMSOIL engine oil keeps my engine running smooth and quiet, and the oil filter is high quality and provides great protection. I’ve had a great experience with both and highly recommend them.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best Motor Oil EverBy JAMES, a Verified Buyer from Orlando on July 27, 2026Ordered and picked up the same day - could have had it delivered but i was in a hurry. I use it in all my cars and trucks for the last 15 years and I never have to worry about my engines.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
civic siBy ADRIAN, a Verified Buyer on July 26, 2026Just the right amount of oil I need for the vehicleBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best product to protect your investmentBy DAVID, a Verified Buyer from Chicora PA on July 26, 2026Best product to protect your investment In the long haul HANDS DOWN!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
5 30 syntheticBy BARRY, a Verified Buyer from Hazletownship Pennsylvania on July 26, 2026Great product and great Customer serviceBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
