Delo 400 monograde heavy duty motor oils are premium quality engine oils. They are formulated utilizing advanced additive technology which helps provide outstanding engine protection for four-stroke diesel engines requiring a monograde engine oil. Delo 400 SAE 10W, 20, 30, 40, and 50 are manufactured using carefully selected premium paraffinic base oils and an optimal blend of dispersant, detergent, oxidation inhibition, antiwear, corrosion inhibition, and defoaming additives. Delo 400 monograde motor oils are high performance crankcase oils for older diesel engines requiring 10W, 20, 30, 40 or 50 monograde engine oil. They are manufactured using selected premium paraffinic base oils and detergent, dispersant, wear control, antioxidant, corrosion inhibitor, and foam suppressant additives. Delo 400 monograde oils are mixed-fleet motor oils recommended for older four-stroke gasoline and diesel engines that require a monograde engine oil. Delo 400 oils are formulated for exceptional performance in older engines using both normal, high, and low sulfur diesel fuels. Delo 400 monograde oils are not recommended for use in DDC two-stroke engines. Delo 400 is approved for: Daimler MB-Approval 228.2 (SAE 30, 40); and MAN M 3275-2 (SAE 30, 40)