AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil
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Advanced Protection for Modern Engines
AMSOIL Signature Series 0W-20 is purpose-built for drivers who demand the absolute best protection for their vehicles. Engineered with advanced synthetic technology, it delivers 75% more engine protection against horsepower loss and wear compared to the GM dexos1 Gen 3 test requirement1, providing an unmatched level of defense for modern engines.
Whether you drive a late-model truck, SUV, or passenger car, Signature Series 0W-20 is formulated to handle the increased stress of turbochargers, direct injection, and start-stop technology found in today's engines.
Key Benefits
- 75% more engine protection against horsepower loss and wear1
- Guaranteed protection for up to 25,000 miles or 1 year
- 50% more cleaning power vs. GM dexos1 Gen 3 test2
- Excellent cold-weather starting and protection
- Advanced protection against LSPI (Low-Speed Pre-Ignition)
- Superior turbocharger protection up to 72% better than required3
Proven Performance You Can Trust
Don't just take our word for it — AMSOIL Signature Series 0W-20 has been independently tested and proven to outperform competing oils in critical areas. From wear protection to extreme temperature performance, the data speaks for itself.
Technical Specifications
| Property | Value |
|---|---|
| Kinematic Viscosity @ 100°C, cSt | 8.8 |
| Kinematic Viscosity @ 40°C, cSt | 47.1 |
| Viscosity Index | 169 |
| Cold-Crank Viscosity | 5,122 cP (-35°C) |
| HTHS Viscosity, cP | 2.67 |
| Flash Point | 220°C (428°F) |
| Fire Point | 244°C (471°F) |
| Pour Point | -53°C (-63°F) |
| NOACK Volatility, % weight loss | 8.5% |
| Total Base Number (TBN) | 12.5 |
Industry Certifications & OEM Approvals
API
- SP (Resource Conserving)
ILSAC
- GF-6A
GM
- dexos1 Gen 3 (License #D10202GL016)
Ford
- WSS-M2C962-A1
Chrysler
- MS-6395
Proven Performance
| Test | Measurement | AMSOIL Result | Improvement |
|---|---|---|---|
| Sequence IVA Engine Test | Average Cam Wear (μm) | 20.28 | 75% better than required |
| Sequence VH Sludge Test | Weighted Piston Deposits (merit) | 5.82 | 50% cleaner than required |
| Sequence VIII Bearing Test | Bearing Weight Loss (mg) | 4.7 | 82% better than required |
Service Life
Normal Service
Highway driving, moderate temperatures, light loads
Severe Service
Frequent short trips, extreme temperatures, towing, dusty conditions
Extended drain intervals do not apply to:
- Diesel-powered engines
- Engines using E85 fuel for more than 50% of operation
- Off-road competition or racing applications
Ready to Upgrade Your Engine Protection?
Join thousands of drivers who trust AMSOIL Signature Series for maximum engine protection. As your Independent AMSOIL Dealer (ZO #{dealerNumber}), we're here to help you find the right products for your vehicle.
Independent AMSOIL Dealer #1858536
Frequently Asked Questions
How often should I change AMSOIL Signature Series 0W-20?
AMSOIL Signature Series 0W-20 is guaranteed for up to 25,000 miles or 1 year under normal service conditions, whichever comes first. Under severe service conditions (frequent short trips, extreme temperatures, towing), change at 15,000 miles or 1 year.
Is AMSOIL Signature Series 0W-20 compatible with other motor oils?
Yes, AMSOIL Signature Series 0W-20 is compatible with other conventional and synthetic motor oils. However, mixing oils may reduce the performance benefits and extended drain capability. For best results, use AMSOIL Signature Series exclusively.
What vehicles use 0W-20 motor oil?
0W-20 is the most commonly recommended viscosity for modern vehicles. It's used in most late-model Honda, Toyota, Ford, GM, Chrysler, Hyundai, Kia, Subaru, and Mazda vehicles. Always check your owner's manual to confirm the correct viscosity for your vehicle.
How do I order AMSOIL products?
Click the "Shop Now" button on this page to order directly from AMSOIL.com through our Independent AMSOIL Dealer account (ZO #1858536). You'll get the best available pricing and can set up a Preferred Customer account for additional savings of up to 25%.
Customer Reviews
See all 6,629 reviewsBest oil on the market
Been using AMSOIL Signature Series for over 10 years. My engines always look clean when I do maintenance, and I've never had a wear-related issue. The extended drain intervals save me time and money.
Noticeable difference from day one
Switched from a competitor synthetic to AMSOIL Signature Series. Engine runs quieter and smoother. Oil analysis at 15,000 miles showed excellent wear numbers. Will never go back.
Perfect for my turbocharged engine
Running this in my 2024 Ford EcoBoost. The turbo protection gives me peace of mind, and the oil holds up perfectly between changes. My mechanic was impressed with how clean the engine looks.
Extended drains actually work
I was skeptical about 25,000-mile drain intervals, but oil analysis proved it. Sent samples to Blackstone Labs at 20,000 miles and everything was within spec. Incredible product.
Outstanding cold weather performance
Living in Minnesota, cold starts matter. This oil flows immediately even at -30°F. My engine sounds happy from the moment I turn the key. The pour point specs are no joke.
Worth every penny
Yes, it costs more upfront than conventional oil. But when you factor in 25,000-mile drain intervals, it actually saves money. Plus my engine is getting better protection. No-brainer.
1 Based on independent testing of AMSOIL Signature Series 0W-20, in the ASTM D6891 engine test as required by the API SP specification.
2 Based on independent testing of AMSOIL Signature Series 5W-30 in the ASTM D8111 (Sequence VH) engine test required by the GM dexos1 Gen 3 specification.
3 Based on independent testing of AMSOIL Signature Series 0W-20 in the ASTM D8048 turbo coking test as required by the GM dexos1 Gen 3 specification.
Independent AMSOIL Dealer #1858536. Product information sourced from AMSOIL. Visit AMSOIL.com for the most current product details and availability.