Mobil Delvac 1250 is an outstanding choice where a monograde lubricant is recommended, including in 2-cycle diesel applications (such as Detroit Diesel Series 53, 71, 92 and 149 two-cycle engines). Mobil Delvac 1250 is a heavy-duty diesel engine oil specially formulated for a wide range of applications including on-highway light- and heavy-duty trucking, plus off-highway industries such as agriculture, construction, quarrying and mining. Mobil Delvac 1250 is created with high-performance base oils combined with ashless dispersants, detergents and inhibitors for outstanding oxidation control and thermal stability, as well as excellent rust and corrosion prevention capabilities.