DELO 400 MGX (15W-40)-4L is a premium heavy-duty diesel engine oil formulated with ISOSYN® Technology and low-ash additives for superior soot control, wear protection, and deposit cleanliness. Suitable for both high- and low-sulfur diesel fuels, it meets API CJ-4 standards and is compatible with engines using DPF, EGR, and SCR systems. Ideal for on- and off-highway applications, it ensures reliable performance across both modern and older diesel engines.