AMSOIL EXTENDED-LIFE 10W-30 100% SYNTHETIC MOTOR OIL

AMSOIL Extended-Life 10W-30 100% Synthetic Motor Oil delivers 20,000-mile drain intervals and 37% more cleaning power than AMSOIL OE Synthetic Motor Oil, making it a strong upgrade for drivers who want premium protection without frequent oil changes.

Modern gasoline engines run hotter and harder than ever. Turbocharged and gasoline direct-injection (GDI) engines in particular generate extreme combustion pressures and temperatures that accelerate oil breakdown, promote deposit formation, and increase the risk of low-speed pre-ignition (LSPI). Conventional oils and even some synthetics can't maintain their protective properties under these conditions for extended periods. The result is thickened oil, increased oil consumption, and sludge accumulation that shortens engine life.

RESISTS OIL BREAKDOWN UNDER EXTREME HEAT
Oil that loses viscosity stability under high temperatures stops protecting. It thins out, burns off faster, and leaves critical surfaces exposed. AMSOIL Extended-Life 10W-30 maintains its fluidity under extreme conditions, with a NOACK volatility of just 5.3% weight loss (ASTM D5800). Lower volatility translates directly to less oil consumption between changes and a more stable protective film on bearing surfaces, cylinder walls, and valve train components. The viscosity index of 146 (ASTM D2270) reflects a formulation that holds its grade across a wide temperature range, from cold starts down to -25°C to sustained highway operation at full operating temperature.

PROTECTS AGAINST LOW-SPEED PRE-IGNITION
LSPI is the spontaneous ignition of the fuel/air mixture before spark-triggered combustion. It generates pressure spikes violent enough to crack pistons and bend connecting rods. Engines with GDI and turbocharging, common in vehicles like the Ford EcoBoost F-150, Chevy Silverado 2.7L Turbo, and Honda CR-V 1.5T, are especially susceptible. AMSOIL Extended-Life 10W-30 is formulated with unique chemistry proven to guard against LSPI events, meeting the demands of the GM dexos1 Gen 3 specification, which supersedes dexos1 Gen 2 and 6094M, and includes rigorous LSPI protection requirements.

37% MORE CLEANING POWER
Deposits on pistons, intake valves, and oil passages restrict flow, trap heat, and reduce efficiency. Extended-Life 10W-30 is fortified with a boosted detergent and dispersant additive package that neutralizes acids and resists sludge, corrosion, and carbon deposits. The 37% cleaning improvement over AMSOIL OE Synthetic Motor Oil means this formulation actively works to keep internal engine surfaces clean over the full drain interval, not just the first few thousand miles. For vehicles like the Jeep Grand Cherokee 3.6L Pentastar, Toyota Tacoma 2.7L, or Nissan Xterra 4.0L that see a mix of highway and around-town driving, that sustained cleaning capability helps preserve engine performance over the long haul.

COLD-WEATHER FLOW AND STARTUP PROTECTION
The CCS viscosity of 5,263 cP at -25°C (ASTM D5293) and pour point of -40°C (ASTM D97) mean this oil flows quickly at startup even in cold climates. Most engine wear occurs in the first few seconds after ignition, before oil reaches critical components. Rapid circulation reduces dry-start wear on camshafts, lifters, and bearings. For trucks and SUVs that sit outside overnight in northern winters, that cold-flow performance makes a measurable difference in long-term engine health.

EXTENDED DRAIN INTERVALS REDUCE MAINTENANCE COSTS
Running a 10W-30 synthetic oil out to 20,000 miles cuts the number of annual oil changes significantly. For fleet vehicles and high-mileage daily drivers, the math is straightforward: fewer oil changes mean less downtime, less waste oil, and lower total maintenance cost per mile. AMSOIL backs this interval with a guarantee under normal service conditions.

Specifications and Compatibility
AMSOIL Extended-Life 10W-30 meets API SQ (Resource Conserving), SP, SN Plus; ILSAC GF-7A, GF-6A, GF-5; ACEA A1/B1, A5/B5; Chrysler MS-6395; Ford WSS-M2C205-A; GM 4718M, 6094M, and dexos1 Gen 3. It is compatible with conventional and other synthetic motor oils. Mixing other oils with AMSOIL motor oils will shorten the oil's life expectancy and reduce its performance benefits. Aftermarket oil additives are not recommended.

Service Life
Normal Service: Up to 20,000 miles (32,000 km) or one year, whichever comes first, in personal vehicles not operating under severe service. Severe Service: Up to 12,000 miles (20,000 km) or one year, whichever comes first. Severe service conditions include commercial or fleet vehicles, excessive idling, frequent towing, hauling, plowing, or driving in dusty conditions. Modified engines (non-stock), racing vehicles, and vehicles using alternative fuels (E85, CNG, propane) are excluded from extended drain interval recommendations. For best performance, use AMSOIL Oil Filters, which are designed for extended drain intervals. Do not exceed 12,000 miles (20,000 km) or one year with other brand filters unless longer intervals are recommended by the vehicle manufacturer. Always change the filter when changing oil. Check oil regularly to maintain proper fill levels.