Mobil Delvac 15W-40 Heavy Duty Diesel Oil, 1 Quart: * Superior soot-viscosity control * Outstanding thermal and oxidative stability * Excellent oil consumption control * Outstanding TBN reserves * Stay-in-grade shear stability * Excellent low temperature pumpability * Superb resistance to corrosive and abrasive wear * Component compatibility * Meets demanding specifications of key OEMs and latest API gasoline service category