Advanced Protection for Heavy-Duty Diesel Engines
AMSOIL 15W40 —100% Synthetic Max-Duty Diesel Oil
AMSOIL 15W40 Synthetic Diesel Oil protects heavy-duty truck engines, tractors, and pickups.
It reduces wear, handles extreme temperatures (-30°F to 400°F+), and lasts up to 3X longer than regular oils.
If you drive a diesel truck, tractor, or pickup, you need oil that can handle heavy loads, extreme weather, and long hours. AMSOIL 15W40 Synthetic Diesel Oil is built for the toughest jobs.
It protects your engine from wear, improves performance, and lasts up to three times longer than conventional oil.
Whether you’re dealing with freezing Canadian winters or blazing American summers, this oil keeps your engine running smoothly.
Product Description
Key Benefits of AMSOIL 15W40
✅ 6X Better Wear Protection – Reduces engine wear and keeps parts like pistons, cylinders, and bearings in top shape.
✅ Works in Extreme Cold – Flows easily at -30°F for quick starts in freezing temperatures.
✅ Handles High Heat – Protects engines even at over 400°F, preventing oil breakdown.
✅ 76% Less Oil Burn-Off – Keeps oil from evaporating under high temperatures, reducing waste and topping off.
✅ Longer Oil Change Intervals – Lasts up to 60,000 miles for over-the-road trucks, cutting maintenance costs.
✅ Better Soot Control – Prevents sludge and deposits, keeping engines clean and efficient.
✅ Compatible with Modern & Older Diesel Engines – Perfect for trucks, agricultural equipment, construction machinery, and more.
Performance You Can Trust
AMSOIL 15W40 is built to handle extreme conditions without breaking down. Whether you drive a Ford Power Stroke, RAM Cummins, or Chevy Duramax diesel truck, this oil is tested to outperform conventional and other synthetic oils.
Temperature Range
- 🌡️ Cold Starts: Works at temperatures as low as -30°F (-34°C).
🔥 High Heat Protection: Resists breakdown in temperatures over 400°F (204°C).
Specifications & Certifications
- Oil Viscosity: 15W-40
- API Rating: CK-4 (meets & exceeds industry standards)
- Volvo VDS4.5
- Cummins CES20086
- Detroit Diesel DFS 93K222
- Available Sizes: Quart, 1-Gallon, 2.5-Gallon, 30-Gallon Drum, 55-Gallon Drum, 275-Gallon Tote
Who You Should Use AMSOIL 15W40?
This synthetic diesel oil is designed for:
- Heavy-Duty Diesel Trucks – Ford Power Stroke, RAM Cummins, Chevy/GMC Duramax
- Farm Equipment – Tractors, combines, and other agricultural machinery
- Construction Equipment – Loaders, bulldozers, excavators, and more
- Older Diesel Engines – Protects and enhances performance in high-mileage engines
🚨 Note: It can be mixed with other diesel oils but works best when used alone.
Sustainability & Safety
- Eco-Friendly – Formulated for lower emissions and cleaner engine operation.
- Non-Toxic – Safe when used as directed.
- Recyclable – Take used oil to your nearest recycling center.
- Warranty Safe – Covered under AMSOIL’s limited warranty.
Frequently Asked Questions
Q: Can I use AMSOIL 15W40 in winter?
Yes! It flows easily at -30°F, making it perfect for cold starts.
Q: How often should I change my oil?
Trucks & Semis: Up to 60,000 miles (based on oil analysis).
Pickups & Personal Diesel Vehicles: Up to 25,000 miles.
Q: Is it safe for biodiesel engines?
Yes, but do not extend oil change intervals beyond 15% biodiesel blends.
Q: Does AMSOIL offer military discounts?
Yes! Visit AMSOIL’s website to check for veteran and military discount programs.
Why AMSOIL 15W40 is the Best Choice
🚛 Trusted by Truckers & Farmers – Used for over 50 years in heavy-duty industries.
💰 Saves You Money – Fewer oil changes mean lower maintenance costs.
🔧 Protects Your Engine – Made in the USA for tough jobs and extreme conditions.
Get the best protection for your diesel engine. Choose AMSOIL 15W40 Synthetic Diesel Oil for superior performance, longer-lasting oil, and ultimate engine protection.
📦 Available in multiple sizes – Buy now and keep your engine running strong!
📢 Note: Results may vary. OEM names belong to their respective manufacturers.
Know more: