AMSOIL 15W-40 (15w40) Signature Series Synthetic Diesel Engine Oil - 3.78L

Developed to protect the horsepower diesel enthusiasts crave and extend the life of hard-working commercial equipment in the most severe conditions. Signature Series synthetic technology delivers max-duty protection in on- and off-road applications.

• Delivers 6X more wear protection, delivering extra protection so you can push your diesel with peace of mind
• Provides long-lasting wear protection, keeping cylinder liners looking like new
• Delivers up to 60 percent better turbo cleanliness
• Withstands the extra demands you place on the turbo when pulling heavy loads or updating the tune for maximum horsepower
• Provides up to 2X better rust protection