4x better wear protection*
AMSOIL Heavy-Duty Synthetic Diesel Oil is engineered to provide 4X better wear protection than required by a leading engine manufacturer’s standard*, giving you the edge to keep trucks and equipment on the job longer.
A diesel truck is a serious investment – don’t skimp on protection. AMSOIL synthetic diesel oils provide the ultimate protection for your hard-working diesel engine, preserving the horsepower you crave and keeping you on the road.
The AMSOIL CI-4+ synthetic diesel oil lineup provides additional high-quality options for pre-2007 diesel applications not equipped with diesel particulate filters (DPF).
6X better wear protection*
Diesel Motor Oil / Engine Oil Formulated with top-grade synthetic technology and maximum additive fortification, Signature Series Max-Duty Synthetic Diesel Engine Oil provides 6X better wear protection than required by a leading engine manufacturer’s standard* – it’s protection boosted to the max.
Minimum wear to diesel cylinder liners and rings leads to increased oil consumption and loss of compression, reducing horsepower and fuel economy. Less oil change service along with Max Protection for Wear.