Shell Rotella T1 40 engine oil fights engine wear and protects against oxidation and corrosion while protecting key diesel-engine components. The oil has a low-ash composition that prevents deposits from forming, keeps intake ports clean, and regulates exhaust emissions. The oil's uses include diesel trucks, transportation operation vehicles, and agricultural equipment, and it's suitable for heavy-duty diesel engines. It may also be utilized with certain mobile hydraulic systems and transmissions.Reliable performance Provides consistent performance throughout the year in the applications for which it was designed. Shell Rotella T1 has been shown to offer superior wear prevention, which helps to extend the life of engines. It has a low ash level, which helps prevent deposits from forming and keeps intake ports clean. It protects critical engine parts from rust and corrosion.Shell Rotella T1 is suitable for older on and off-road diesel vehicles, as well as some stationary engines.Shell Rotella T1 is suitable for heavy equipment used in construction, mining, or quarry operations.Shell Rotella T1 40 is suitable for use in Detroit Diesel two-cycle engines (Series 40).