Mobil Delvac Legend 20W-50 Standard Defense is a versatile synthetic diesel engine oil designed to offer reliable protection for engines operating under severe conditions. Recommended by ExxonMobil for use in a wide range of heavy-duty applications including transportation, construction, and agriculture, this oil provides enhanced engine protection, extends engine life, and ensures excellent control of high-temperature deposits. Its stable viscosity at high temperatures and reduced low-temperature deposits ensure easier cold starts and lower oil consumption. With a high total base number for long-term wear and deposit protection, it is ideal for commercial trucks, heavy-duty vehicles, and off-road equipment.