AMSOIL Signature Series 100% Synthetic Motor Oil | Advanced Protection

Advanced Motor Oil Technology

AMSOIL was founded on innovation, beginning with our introduction of the world’s first API-qualified synthetic motor oil. By ignoring commonly accepted limitations and refusing to stop short of success, we set a new benchmark for lubricant performance. These same principles continue to guide our product development, resulting in Signature Series Synthetic Motor Oil.

Signature Series is not only the best oil we have ever made, it’s also better than any competitor oil we have tested. Some may claim that Signature Series is over-engineered. Perfect. It’s not for everyone. It’s for those who want the absolute best engine protection — and it delivers.

Choose Your Viscosity

Proven Performance Through Independent Testing

75% More Engine Protection Against Wear

Signature Series Synthetic Motor Oil develops a strong fluid film that keeps metal surfaces separated. Its robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life.

In the Sequence IVA Engine Test, which simulates extended periods of stop-and-go driving, AMSOIL Signature Series 0W-20 provided 75% more engine protection against horsepower loss and wear than required by the industry standard, extending the life of vital components like pistons and cams.

Test Results:

• Industry Standard: 90 μm average cam wear
• AMSOIL Signature Series 0W-20: 20.28 μm average cam wear
• 77% better wear protection than the standard requires

100% Protection Against Low-Speed Pre-Ignition (LSPI)

Modern turbocharged, direct-injection engines are prone to LSPI, which can cause catastrophic engine damage. Signature Series achieved 100% protection against LSPI in the engine test required by the GM dexos1 Gen 3 specification — zero occurrences were recorded throughout five consecutive tests.

Protects Turbochargers 72% Better

The tremendous heat and stress turbos create can cause some oils to break down and form harmful bearing deposits through turbo coking. In the GM Turbo Coking Test, Signature Series limited temperature increase to only 3.6%, protecting the turbocharger 72% better than required by the GM dexos1 Gen 3 specification.

50% More Detergents for Maximum Cleaning Power

AMSOIL Signature Series has 50% more detergents than AMSOIL OE Motor Oil to help keep oil passages clean and promote oil circulation. In the Sequence VG Engine Test, Signature Series kept the oil pick-up tube screen virtually free from sludge, providing 90% better protection against sludge.

For maximum cleaning when switching to Signature Series, consider using AMSOIL Engine Flush to remove deposits and ensure a clean start.

Extended Drain Intervals: Protection Guaranteed

AMSOIL Signature Series Synthetic Motor Oil provides reserve protection, allowing you to go longer between oil changes if you choose:

Normal Service

• Up to 25,000 miles (40,200 km)
• 700 hours of operation
• One year
• Whichever comes first

For personal vehicles not operating under severe service conditions.

Severe Service

• Up to 15,000 miles (24,140 km)
• 700 hours of operation
• One year
• Whichever comes first

Severe service conditions include commercial or fleet vehicles, excessive idling, frequent towing, hauling, plowing or driving in dusty conditions.

Important Notes:

• Modified engines (non-stock), racing vehicles and vehicles using alternative fuels (E85, CNG, propane, etc.) are excluded from extended drain interval recommendations
• Change at the vehicle manufacturer’s recommended drain interval outside U.S. and Canada
• AMSOIL Oil Filters are designed for extended drain intervals. Do not exceed 12,000 miles or one year with other brand filters
• Always change filter when changing oil
• Check oil regularly to maintain proper fill levels

Verify Your Extended Drain Intervals: Confirm your extended drain intervals are working with AMSOIL Oil Analysis Kits. Oil analysis provides scientific data about your oil’s condition and can help optimize drain intervals for your specific driving conditions.

Technical Specifications

Applications & Specifications

0W-16 (AZS)

• API SP (Resource Conserving), SN Plus, SN
• ILSAC GF-6B

0W-20 (ASM)

• API SP (Resource Conserving), SN PLUS, SN
• GM dexos1 Gen 3 (supersedes dexos1 Gen 2 and 6094M)
• ACEA A1/B1
• Ford WSS-M2C947-B1, WSS-M2C947-A, WSS-M2C962-A1
• Chrysler MS-6395
• ILSAC GF-6A, GF-5, GF-4

5W-20 (ALM)

• API SP (Resource Conserving), SN PLUS, SN
• GM dexos1 Gen 3
• ACEA A1/B1
• Ford WSS-M2C945-B1, WSS-M2C945-A, WSS-M2C930-A, WSS-M2C960-A1
• Chrysler MS-6395
• ILSAC GF-6A, GF-5, GF-4

0W-30 (AZO)

• API SP (Resource Conserving), SN PLUS, SN
• GM dexos1 Gen 3 (supersedes dexos1 Gen 2, LL-A-025, 6094M and 4718M)
• ACEA A5/B5, A1/B1
• Ford WSS-M2C963-A1
• Chrysler MS-6395
• ILSAC GF-6A, GF-5, GF-4

5W-30 (ASL)

• API SP (Resource Conserving), SN PLUS, SN
• GM dexos1 Gen 3
• ACEA A5/B5, A1/B1
• Honda HTO-06
• Ford WSS-M2C946-B1, WSS-M2C946-A, WSS-M2C929-A, WSS-M2C961-A1
• Chrysler MS-6395
• ILSAC GF-6A, GF-5, GF-4

10W-30 (ATM)

• API SP (Resource Conserving), SN PLUS, SN
• ACEA A5/B5, A1/B1
• Ford WSS-M2C205-A
• Chrysler MS-6395
• GM LL-A-025, 6094M, 4718M
• ILSAC GF-6A, GF-5, GF-4

0W-40 (AZF)

• API SP, SN PLUS, SN
• Chrysler MS-A0921, MS-12633, MS-10725, MS-10850
• Nissan GT-R
• GM dexos R

5W-50 (AMR)

• API SP, SN PLUS, SN
• Ford WSS-M2C931-C (Mustang)
• GM dexos R

Trusted by Professional Engine Builders

Dedicated engine builders and mechanics put in long hours honing their craft. These architects of powerful, high-performance engines turn to Signature Series to protect their passion.

“When we use AMSOIL, I don’t worry about a film breakdown or an oil breakdown — and the oil pressure is always consistent. We’ve tested oils back-to-back on the dyno in our shop and we’re always able to make more power with AMSOIL.”

— Brett Bowers, Professional Engine Builder

Order AMSOIL Signature Series

Get the absolute best engine protection with AMSOIL Signature Series Synthetic Motor Oil.

Shop Signature Series at AMSOIL.com Independent AMSOIL Dealer #1858536

For wholesale pricing, contact National Synthetics about the Preferred Customer program and save up to 25% on all AMSOIL products.

Frequently Asked Questions

AMSOIL Product Warranty

Using AMSOIL synthetic lubricants does not void your new vehicle or equipment manufacturer’s warranty. All AMSOIL lubricants and filters are covered by the AMSOIL Limited Warranty. For complete information visit AMSOIL.com/guarantee.

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Based on independent testing as documented in AMSOIL Data Sheet G2880. All trademarked names and images are the property of their respective owners. No affiliation or endorsement claim, express or implied, is made by their use.