DELO 400 premium quality, heavy-duty motor oil exceeds OEM specifications and provides exceptional protection, even under severe conditions. The biggest selling heavy-duty engine oil in the USA, this premium quality engine oil exceeds industry and factory performance specifications. Recommended for all 4-cycle diesel and 4-cycle gasoline engines operating under severe conditions. Formulated with the most advanced additive technology. Key Features Superior results with either low or normal sulfur diesel fuels Top-quality, heavy-duty oil for 4-cycle gasoline and diesel engines Provides exceptional protection, even under severe conditions