AMSOIL Extended-Life 10W-40 100% Synthetic Motor Oil (Quart/946ml)

Advanced Synthetic Protection for Long-Lasting Engine Performance

AMSOIL Extended-Life 10W-40 100% Synthetic Motor Oil is a premium full-synthetic engine oil engineered for drivers who demand long-drain protection, engine cleanliness and dependable performance.

Formulated with advanced synthetic base oils and a boosted additive package, AMSOIL Extended-Life helps resist oil breakdown, control deposits and protect engine components under demanding operating conditions. AMSOIL states that the Extended-Life formula provides up to 20,000 miles (32,000 km) or one year of protection under normal service in personal vehicles, whichever comes first. 

Key Features

• Brand: AMSOIL
• Product: Extended-Life 10W-40 100% Synthetic Motor Oil
• Viscosity: 10W-40
• Product Series: Extended-Life (XL)
• 100% synthetic motor oil
• Advanced synthetic base oils
• Boosted additive package
• Helps resist oil breakdown
• Helps maintain engine cleanliness
• Protects against Low-Speed Pre-Ignition (LSPI)
• Helps reduce sludge, deposits and corrosion
• Designed for extended oil-drain intervals
• Suitable for a wide range of gasoline and diesel applications where 10W-40 is specified

Advanced Synthetic Engine Protection

AMSOIL Extended-Life is designed for drivers who want dependable protection over extended service intervals.

Its synthetic formulation is engineered to maintain viscosity under demanding conditions while helping reduce engine deposits, excessive oil consumption and wear. The detergent and dispersant additive system helps keep the engine clean by controlling sludge, acids and carbon deposits. 

37% More Cleaning Power

AMSOIL states that Extended-Life Motor Oil provides 37% more cleaning power compared with AMSOIL OE Synthetic Motor Oil.

The enhanced cleaning capability helps control deposits and maintain a cleaner engine environment, supporting smoother and longer engine operation. 

Protection Against LSPI

Modern turbocharged gasoline engines can be susceptible to Low-Speed Pre-Ignition (LSPI), an abnormal combustion event that can potentially cause severe engine stress.

AMSOIL Extended-Life features chemistry specifically designed to help protect pistons against the harmful effects of LSPI. 

Always verify the oil specification required by your particular engine before use.

Resists Oil Breakdown

Engine oil is exposed to heat, pressure and contamination during operation.

AMSOIL Extended-Life is formulated to resist oil breakdown and maintain viscosity under demanding operating conditions. This helps support:

• Consistent lubrication
• Reduced oil degradation
• Engine cleanliness
• Wear protection
• Reliable operation under demanding conditions

Keeps Engines Cleaner

The boosted additive package combines detergent and dispersant chemistry to help control contaminants and deposits.

It is designed to help:

• Neutralize acids
• Resist sludge
• Control carbon deposits
• Reduce engine deposits
• Maintain cleaner engine internals

Extended Oil-Change Protection

One of the key advantages of AMSOIL Extended-Life is its extended-drain capability.

For personal vehicles operating under normal service, AMSOIL states a protection interval of up to 20,000 miles (32,000 km) or one year, whichever comes first. 

This does not mean every vehicle should automatically run 20,000 miles between oil changes. Always consider the vehicle manufacturer’s recommended oil-change interval, engine condition, operating conditions and applicable warranty requirements.

Ideal For

AMSOIL Extended-Life 10W-40 is suitable for vehicles where 10W-40 viscosity and the required performance specifications are approved, including suitable:

• Passenger cars
• SUVs
• Light trucks
• Gasoline engines
• Turbocharged gasoline engines where approved
• Selected diesel applications where approved
• Daily-driven vehicles
• High-mileage commuting
• Vehicles subjected to demanding driving conditions

Always check your owner’s manual for the required viscosity and oil specification before purchasing.

Benefits

Extended Protection

Designed to provide long-lasting protection and support extended oil-change intervals under appropriate service conditions.

Advanced Engine Cleanliness

Enhanced detergency and dispersancy help control sludge, deposits and contaminants.

Strong Wear Protection

Synthetic formulation helps protect engine components against wear during normal and demanding operation.

Thermal Stability

Helps resist oil breakdown when exposed to high operating temperatures.

LSPI Protection

Formulated to help protect against the harmful effects of low-speed pre-ignition.

Reduced Maintenance

Extended-drain capability can reduce the frequency of oil changes when permitted by the vehicle and operating conditions.

How to Use

1. Verify that 10W-40 is the correct viscosity for your vehicle.
2. Confirm that the oil meets the required manufacturer specifications for your engine.
3. Warm the engine according to the vehicle manufacturer’s oil-change procedure.
4. Drain the existing engine oil completely.
5. Replace the engine oil filter.
6. Reinstall the drain plug using the correct procedure.
7. Add the required quantity of AMSOIL Extended-Life 10W-40.
8. Start the engine and allow it to run briefly.
9. Check for leaks around the drain plug and oil filter.
10. Switch off the engine and allow the oil to settle.
11. Check the dipstick and adjust the oil level if necessary.

Do not overfill the engine.

Oil Change Recommendations

AMSOIL Extended-Life is designed for extended-drain operation, but the correct interval depends on the vehicle and operating conditions.

For normal service in eligible personal vehicles, AMSOIL specifies up to 20,000 miles (32,000 km) or one year, whichever comes first. 

For severe service, older engines, commercial use or vehicles with specific manufacturer requirements, follow the applicable maintenance schedule and oil-analysis recommendations rather than automatically using the maximum interval.

Important Compatibility Information

10W-40 does not mean this oil is suitable for every vehicle requiring 10W-40.

Before using AMSOIL Extended-Life 10W-40, confirm:

• Recommended viscosity
• API specification
• Manufacturer approvals/requirements
• Gasoline or diesel application
• Turbocharged engine requirements
• Vehicle manufacturer’s oil-change requirements

The correct oil specification is more important than viscosity alone.

Product Specifications

• Brand: AMSOIL
• Product Series: Extended-Life
• Product: 100% Synthetic Motor Oil
• Viscosity: 10W-40
• Product Code: XLO
• Base Oil: Synthetic
• Application: Automotive Engine Oil
• Primary Use: Gasoline and compatible diesel engines
• LSPI Protection: Yes
• Extended-Drain Capability: Up to 20,000 miles / 32,000 km or one year under specified normal-service conditions
• Package Sizes: Quart, Gallon.

Frequently Asked Questions

What is AMSOIL Extended-Life 10W-40?

It is a 100% synthetic motor oil from AMSOIL’s Extended-Life series, formulated for long-lasting engine protection, cleanliness and resistance to oil breakdown.

Is AMSOIL Extended-Life 10W-40 fully synthetic?

Yes. It is marketed by AMSOIL as 100% Synthetic Motor Oil. 

How long can I use this oil?

For eligible personal vehicles under normal service, AMSOIL states up to 20,000 miles (32,000 km) or one year, whichever comes first. 

Can I use it in a turbocharged engine?

It may be suitable for turbocharged engines where the vehicle’s required viscosity and oil specifications are met. The formula is designed to provide LSPI protection, but always verify the specific requirements in your owner’s manual.

Does it protect against LSPI?

Yes. AMSOIL specifically states that Extended-Life contains chemistry designed to help protect pistons against the harmful effects of Low-Speed Pre-Ignition (LSPI). 

Does it help keep the engine clean?

Yes. AMSOIL states that the oil uses detergent and dispersant additives to help control sludge, acids, corrosion and carbon deposits. 

Is 10W-40 suitable for every car?

No. Always use the viscosity and performance specification recommended for your specific engine.

Should I change the oil filter when using AMSOIL Extended-Life?

Yes. A fresh oil filter is recommended when performing an oil change.

Why Choose AMSOIL Extended-Life 10W-40?

AMSOIL Extended-Life 10W-40 100% Synthetic Motor Oil is engineered for motorists looking beyond conventional oil-change intervals. Its advanced synthetic formulation combines long-lasting protection, enhanced cleaning power, LSPI protection and resistance to oil breakdown.

For vehicles that specifically require or approve 10W-40, it provides a premium synthetic option designed to keep the engine cleaner and protected for longer.

Advanced synthetic protection. Extended performance. Cleaner engines.

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