DEOMAX 15W-40 (API CI-4/SL) is a high-performance, multigrade heavy-duty diesel engine oil formulated using selected base oils and a balanced additive system designed to deliver reliable engine protection across a wide range of operating conditions.

It provides effective resistance against wear, oxidation, and thermal degradation, while controlling soot-related viscosity increase and deposit formation. This ensures maintained engine cleanliness, lubricant stability, and consistent performance under demanding operating environments such as high load, elevated temperatures, and extended operating hours.

The formulation supports dependable engine operation and durability in both on-highway and off-highway applications. It is suitable for turbocharged and naturally aspirated diesel engines, as well as mixed fleet operations where API CI-4/SL performance level lubricants are required.

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