15W40 Synthetic Diesel Oil
Whether you're looking for ultimate wear protection for your personal truck or want to lower overhead for your business, we have you covered. Check out the 15W-40 specs or explore AMSOIL's business opportunities for deep discounts.
Why Choose AMSOIL Heavy Duty Diesel Oil?
AMSOIL 15W-40 is a premium synthetic lubricant tailored for high-performance diesel engines. Meeting and exceeding API CK-4 specifications, it is fully compatible with modern exhaust treatment systems like Diesel Particulate Filters (DPF) and Selective Catalytic Reduction (SCR). Our advanced shear-stable formula protects critical engine components from wear, reduces oil consumption, and maintains excellent cold-start fluidity, making it the top choice for both over-the-road trucks and off-road equipment.
Superior Wear Protection: Guards cylinders and bearings against friction.
Extreme Temperature Stability: Resists oxidation and thickening in high-heat environments.
Extended Service Life: Reduces maintenance costs through longer intervals between oil changes.
Emission System Safe: Low-sulfated ash formula protects DPFs from clogging.
AMSOIL 15W-40 Product Line
15W-40 Commercial Grade Diesel Oil
Why settle for standard oil when you can have AMSOIL quality? Our 15W-40 Commercial-Grade Diesel Oil is specially formulated for the diesel enthusiast who wants 100% synthetic performance at a synthetic-blend price. It flows better in the cold for safer starts and stands up to the heavy loads that cause lesser oils to break down. Protect your investment and reduce your downtime with the name pros trust.
AMSOIL 15W-40 Max-Duty Diesel Oil
Experience the ultimate in engine defense. This 100% synthetic powerhouse delivers 6X more wear protection than required by leading industry standards, ensuring your hard-working diesel stays at peak performance. Specially formulated to keep turbos clean and provide up to 2X better rust protection, it’s the elite choice for enthusiasts who demand no compromises in reliability, power, and engine longevity.
AMSOIL 15W-40 Heavy-Duty 100% Synthetic Diesel Oil
Get the peace of mind that only 100% synthetic oil can provide. Our Heavy-Duty 15W-40 is built to withstand the rigors of heavy hauling, towing, and idling. It features an advanced additive package that fights soot and sludge, keeping your oil passages clear and your engine protected. With 4X better wear protection and significantly reduced oil consumption, it’s the smart upgrade for any modern diesel engine.
AMSOIL 15W-40 Heavy-Duty Diesel and Marine Oil
If you drive a pre-emissions diesel, this is your engine's best friend. This 100% synthetic 15W-40 is engineered with an advanced additive package that excels in engines where modern "low-SAPS" oils might fall short. It resists the thinning effects of high heat and heavy loads, providing a massive boost in acid neutralization and engine cleanliness. Keep your vintage power plant running like new with AMSOIL’s high-performance marine-grade protection.
Features
15W40 Marine
15W40 Signature
Heavy-Duty 15W40
AMSOIL 15W-40 Commercial Grade Diesel Oil
