AMSOIL SAE 15W-40 Synthetic
Heavy Duty Diesel and Marine Oil

Fuel efficient formula for both gasoline and diesel engines.

Extended drain capability reduces downtime and oil expenses. Twelve TBN formula fights corrosion. AMSOIL 15w-40 heavy duty diesel motor oil resists oil breakdown in your engine from heat, blow-by chemicals and oxygen longer than conventional oils.

Reduces friction and drag so effectively, your engine will achieve its maximum potential fuel economy while reducing wear and improving performance.

By resisting varnish and sludge, your engine stays cleaner. Remaining fluid at -47º F, your engine receives immediate cold start lubrication. This greatly reduces engine wear and prolongs engine life.

Designed to deliver 1,000,000 miles in over the road trucks before engine overhaul.

Exceeds the most demanding world-wide performance standards and meets diesel specifications CH-4, CG-4, CF-2, CF, and CI-4 while exceeding all API SJ gasoline engine requirements.

AMSOIL 15w-40 Heavy Duty Diesel Oil benefits:

• Increased fuel economy

• Extended drain intervals

• Easier cold weather starting

• Unsurpassed hot and cold temperature protection

• Less maintenance and down time

• Longer engine/equipment life

• Better engine performance

• Reduced waste oil disposal
   

AMSOIL 15w-40 Heavy Duty Diesel Oil applications:

• Light and heavy duty diesel engines 

• Light and heavy duty gasoline engines

• Boats

• Fleets and industrial engines

• Construction, earth moving, farming, mining

Use these links for specific information you need to know:

• How AMSOIL 15w-40 diesel oil compares to other leading brands in Noack Volatility and Heat Stability tests

• Converting your new or old engine to AMSOIL

• AMSOIL 15w-40 Diesel Oil technical specifications in .pdf format

• Customer testimonials

Designed for extended drain intervals