Shell Rotella T1 40W Heavy Duty Conventional Diesel Motor Oil 1galThe Shell Rotella T1 40W CFSL 1 Gallon is a monograde heavy-duty diesel engine oil formulated to provide quality lubrication and consistent performance. Designed with well-proven performance additives, Excellent long-term corrosion protection of all cooling system metals including aluminum, brass, cast iron, steel, solder, and copper. This oil is suitable for both turbocharged and non-turbocharged diesel engines, offering dependable protection under a wide range of operating conditions.Features API CF Service Category: Meets the requirements for heavy-duty diesel engines.; Low Ash Content: Minimizes the formation of deposits and helps keep intake ports clean.; Oxidation Resistance: Helps maximize service life by resisting oil breakdown.;