AMSOIL Extended-Life 100% Synthetic Motor Oil 5W-20
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Enhanced Protection for Peace of Mind and Convenience
AMSOIL Extended-Life 5W-20 100% Synthetic Motor Oil is overbuilt for road warriors so you can confidently drive up to 20,000 miles (32,000 km) or one year, whichever comes first, between oil changes. A proprietary combination of advanced synthetic base oils and a boosted additive package promotes cleanliness and prolonged engine life.
Key Benefits
- Drive up to 20,000 miles or one year between oil changes
- Resists oil breakdown under extreme high-temperature conditions
- Protects against low-speed pre-ignition (LSPI) in GDI turbo engines
- Boosted additive package neutralizes acids and resists sludge and deposits
- Maintains viscosity stability for consistent protection
- Compatible with conventional and other synthetic motor oils
- API SQ Resource Conserving and GM dexos1 Gen 3 approved
Built to Resist Breakdown and Protect Against LSPI
Extended-Life Synthetic Motor Oil maintains its fluidity (viscosity) under extreme conditions. Some oils break down and significantly increase in viscosity after extended periods of high-temperature operation, causing excessive oil consumption, engine deposits, accelerated wear, and difficult cold starts. AMSOIL Extended-Life resists oil breakdown, ensuring protection in extreme temperatures.
AMSOIL Extended-Life features unique chemistry to protect against low-speed pre-ignition (LSPI). LSPI is the spontaneous ignition of the fuel/air mixture prior to spark-triggered ignition, which can destroy pistons and connecting rods in modern GDI turbocharged engines.
Technical Specifications
| Property | Value |
|---|---|
| Kinematic Viscosity @ 100°C, cSt | 8.7 |
| Kinematic Viscosity @ 40°C, cSt | 49.3 |
| Viscosity Index | 155 |
| CCS Viscosity, cP (°C) | 5242 (-30) |
| Flash Point | 226°C (439°F) |
| Fire Point | 244°C (471°F) |
| Pour Point | -42°C (-44°F) |
| NOACK Volatility, % weight loss | 8.4 |
| High-Temperature/High-Shear Viscosity @ 150°C, cP | 2.9 |
| Total Base Number | 10.7 |
Industry Certifications & OEM Approvals
API
- SQ (Resource Conserving), SP, SN Plus
ILSAC
- GF-7A, GF-6A, GF-5
GM
- dexos1 Gen 3 (supersedes dexos1 Gen 2 and 6094M)
ACEA
- A1/B1
Chrysler
- MS-6395
Ford
- WSS-M2C930-A, WSS-M2C945-A, WSS-M2C945-B1, WSS-M2C960-A1, WSS-M2C970-A1
Specifications and Approvals
AMSOIL Extended-Life 5W-20 meets: API SQ (Resource Conserving), SP, SN Plus; ILSAC GF-7A, GF-6A, GF-5; GM dexos1 Gen 3 (supersedes dexos1 Gen 2 and 6094M); ACEA A1/B1; Chrysler MS-6395; Ford WSS-M2C930-A, WSS-M2C945-A, WSS-M2C945-B1, WSS-M2C960-A1, WSS-M2C970-A1.
Pros and Cons
Pros
- Drive up to 20,000 miles or one year between oil changes
- Resists oil breakdown under extreme high-temperature conditions
- Protects against low-speed pre-ignition (LSPI) in GDI turbo engines
- Boosted additive package neutralizes acids and resists sludge and deposits
- Maintains viscosity stability for consistent protection
- Compatible with conventional and other synthetic motor oils
- API SQ Resource Conserving and GM dexos1 Gen 3 approved
Cons
- Premium Investment: Higher initial cost compared to conventional or "shelf-brand" synthetic oils.
- Limited Local Retail: Primarily available through authorized dealers and specialized synthetic outlets. National Synthetics is a local stocking dealer. Call 1-678-944-8816 to confirm in-stock items for same-day local pickup.
Order Through Your Independent AMSOIL Dealer
Extend your oil changes with confidence. As your Independent AMSOIL Dealer, we provide expert guidance and competitive pricing on all AMSOIL products.
Independent AMSOIL Dealer #1858536
Shipping & Returns
Fast, Reliable Shipping
- Free standard ground shipping on orders of $100 ($130 in Canada) or more.
- Orders under the threshold ship for a flat $9.99 ($12.99 in Canada) freight charge.
- In-stock items typically delivered in two to three business days.
- U.S. and Canada only — no shipments to PO Boxes.
30-Day Return Policy
- Return unopened, currently marketed products within 30 days for a full refund (minus freight).
- Exchange unopened products within 90 days with no restocking fee.
- Special-order items are non-returnable.
- Returns are handled directly by AMSOIL.
Frequently Asked Questions
Under normal service in personal vehicles, you can drive up to 20,000 miles (32,000 km) or one year, whichever comes first. Under severe service (commercial/fleet vehicles, excessive idling, frequent towing/hauling), the interval is up to 12,000 miles (20,000 km) or one year.
Yes. AMSOIL Extended-Life 5W-20 features unique chemistry specifically formulated to guard against low-speed pre-ignition (LSPI), which is a concern in modern gasoline direct injection (GDI) engines often coupled with turbochargers.
Yes, Extended-Life is compatible with conventional and other synthetic motor oils. However, mixing other oils will shorten the oil's life expectancy and reduce its performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed.
Both provide the same high-temperature protection (the '20' rating). The difference is cold-weather flow: 0W-20 flows more easily at very low temperatures, making it ideal for extreme cold climates. 5W-20 is suitable for most climates and is specified by many Ford and GM vehicles. Always use the viscosity grade specified in your owner's manual.
Independent AMSOIL Dealer #1858536. Product information sourced from AMSOIL. Visit AMSOIL.com for the most current product details and availability.