Mastermax 10W40 API CJ4 is an advanced semi-synthetic engine oil designed to meet stringent European and American heavy-duty diesel engine specifications. Formulated with selected synthetic base oils and advanced additives, it provides excellent protection against wear, deposits, and camshaft damage in turbocharged engines. Its superior cold-flow characteristics ensure reliable starts in low temperatures, while its thermal and oxidation stability guarantee performance under high-heat operating conditions. This oil significantly reduces engine wear, enhances durability, and maintains efficiency even in extended service intervals. Meeting API CJ4 requirements, it is engineered for use with modern emission control systems, including those using diesel particulate filters (DPF). Mastermax 10W40 CJ4 ensures exceptional engine protection, fuel efficiency, and long-term operational reliability.




10W40 API CJ4 is a semi-synthetic multigrade diesel engine oil offering excellent wear protection, deposit control, and cold-flow performance for modern European and American heavy-duty diesel engines.
We’re always happy to hear from you! Leave us a message with your query or requirement, and our team will reach out shortly with helpful answers, personalized suggestions, and dedicated assistance to ensure you get exactly what you need.
Emerald Business Park, Kutch Road Nairobi - Kenya
Office : +254 794 205 115
Director : +254 757 297 662