Minimal crownland deposits and outstanding oxidation stability lead to the ability to minimize oil consumption. Excellent control of deposits and wear optimize the engine overhaul intervals. High detergency provides excellent deposit and sludge control in the piston ring belt area. Delo 400 monograde oils are mixed-fleet motor oils recommended for older four-stroke gasoline and diesel engines that require a monograde engine oil. For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.