AMSOIL diesel engine oil delivers exceptional protection and performance for heavy-duty trucks, commercial fleets, and marine applications. The Signature Series lineup offers premium 100% synthetic formulations in viscosities including 15W-40, 5W-40, 0W-40, 5W-30, and 10W-30, engineered to provide maximum wear protection, extended drain intervals, and superior cold-weather starting. These max-duty diesel oils are designed to meet the demands of modern diesel engines while reducing operating costs through longer service life.
For everyday heavy-duty applications, AMSOIL Heavy-Duty Synthetic Diesel Oil is available in 15W-40, 5W-40, and 10W-30 viscosities, providing outstanding protection against heat, deposits, and wear. The 0W-20 and 5W-30 synthetic diesel oils offer improved fuel efficiency for newer diesel engines requiring lower-viscosity lubricants. Fleet operators and commercial users benefit from AMSOIL Commercial Grade Diesel Oil in 15W-40 and 10W-30, delivering reliable protection at an economical price point.
Specialized formulations round out the AMSOIL diesel oil lineup, including the 15W-40 Heavy-Duty Diesel and Marine Oil for boats and watercraft, and the DOMINATOR 20W-50 Competition Diesel Oil for high-performance racing and pulling applications. Whether you need synthetic diesel oil for over-the-road trucking, agricultural equipment, or competition use, AMSOIL provides a diesel engine oil solution engineered to outperform conventional oils and protect your investment.
