Which AMSOIL Diesel Oil is Right for Me? Joel Youngman | Mar 11, 2021 8:22 AM AMSOIL offers a full line of premium-quality synthetic diesel oils, but which AMSOIL diesel oil is right for your application? We break it down. Signature Series Max-Duty 5W-30 Synthetic Diesel Oil MIXED FLEETS Signature Series 5W-30 is a versatile oil aimed at mixed fleets of diesel and gasoline vehicles, simplifying maintenance and lubricant inventory. · 6X more engine protection 1 · Outstanding cold-temperature performance · Extended-drain capability maximizes convenience and minimizes downtime Can I Use Diesel Oil in My Gas Engine? Signature Series Max-Duty 0W-40 Synthetic Diesel Oil VEHICLES AND EQUIPMENT OPERATING IN COLD CLIMATES Signature Series 0W-40 is formulated specifically for diesel applications operating in extreme cold, helping engines turn over faster and reducing startup wear. · 4X better cold-temperature performance 2 · Provides ou...