Keep diesel-powered engines at peak performance. These oils usually have a high viscosity and large amounts of anti-wear additives to endure the higher temperatures, oxidation rates, and the level of deposits found in diesel engines. They are designated "C" category by the API.
For Heavy Duty Engines
Commercial fleet diesel engines, construction equipment, and agricultural engines require these heavy duty oils, which adhere to API standards.
For Heavy Duty 2-Cycle Engines
These monograde oils are formulated for older 2-cycle heavy duty diesel engines as well as older 4-cycle gasoline engines. They are rated API category CF-2 and SF and should not be used with diesel-powered engines made after 2009 or gasoline-powered engines made after 1988.
Valvoline All-Fleet Plus
For Light & Medium Duty Engines
These monograde oils protect against wear, corrosion, and deposits to promote longer engine life and control emissions. They are formulated for use in light- to medium duty diesel trucks in urban or long-distance service as well as tractors, pumps, and generators.
Shell Rotella T1
For Natural Gas & Propane Engines
Use these specially formulated oils to help reduce wear and protect against oxidation and deposits that can extend oil life and decrease the frequency of oil changes. They can be used in vehicles that are powered by natural gas and propane, such as some buses, trucks, and service vehicles.