Mobil Delvac Modern™ 15W-40 Super Defense V4 is a high-performance synthetic diesel engine oil designed to provide exceptional lubrication and extend engine life under demanding conditions. It exceeds or meets the requirements of major European and American engine manufacturers, offering effective performance for both modern low-emission engines and older engines running on low or high-sulfur fuels. This oil features a blend of high-quality base oils and a balanced additive system that helps control oil thickening due to diesel soot and high temperatures, ensuring resistance to oxidation, corrosion, and high-temperature deposits. It is recommended by ExxonMobil for use in heavy-duty applications including trucking, construction, mining, and agriculture.