Advanced Synthetic Blend Protection for Heavy-Duty Diesel Engines

Gulf Super Duty Select SB 15W40 CK-4 is a high-performance synthetic blend diesel engine oil engineered to meet the demanding requirements of today’s turbocharged, four-stroke, low-emission diesel engines. Formulated with premium synthetic base oils and advanced next-generation additive technology, this API CK-4 engine oil delivers outstanding protection against wear, soot, oxidation, and thermal breakdown while helping maximize engine reliability and service life. It is fully backward compatible for older diesel engines requiring previous API service categories, making it an excellent choice for mixed fleets.

Its SAE 15W-40 viscosity provides dependable cold-start protection while maintaining a durable lubricating film during high-temperature operation. This balanced formulation helps reduce engine wear, improve fuel economy, and support extended oil drain intervals when recommended by the engine manufacturer.

Outstanding Wear Protection and Engine Cleanliness

Gulf Super Duty Select SB 15W40 CK-4 utilizes advanced anti-wear additives that help protect pistons, bearings, camshafts, valve train components, and turbochargers under severe operating conditions. Its shear-stable formulation maintains critical oil film thickness throughout extended service, providing dependable protection in high-load commercial applications.

The advanced detergent and dispersant system effectively controls soot, sludge, and piston deposits, helping maintain cleaner engines and longer component life. Excellent oxidation resistance, TBN retention, and advanced aeration control further enhance engine protection by minimizing oil degradation and reducing harmful air entrainment in the lubrication system.

Ideal for On-Road and Off-Road Diesel Equipment

Gulf Super Duty Select SB 15W40 CK-4 is recommended for heavy-duty trucks, commercial fleets, buses, construction equipment, mining equipment, agricultural machinery, earthmoving equipment, and marine diesel engines requiring an API CK-4 engine oil. It meets or exceeds numerous OEM specifications, including Cummins CES 20086, Detroit Diesel DFS 93K222, Volvo VDS-4.5, Mack EOS-4.5, Ford WSS-M2C171-F1, Mercedes-Benz 228.31, ACEA E9, and many additional manufacturer requirements.

Dependable Performance Under Severe Operating Conditions

Whether powering long-haul trucks, construction fleets, agricultural equipment, or industrial diesel engines, Gulf Super Duty Select SB 15W40 CK-4 delivers dependable performance under demanding operating conditions. Its combination of synthetic blend technology, outstanding wear protection, soot control, oxidation resistance, and extended drain capability helps reduce maintenance costs while maximizing engine reliability and uptime.

For optimum performance, always follow the engine manufacturer’s recommendations for oil specifications, viscosity grade, and service intervals.