PEAK P4MJ576 SAE 15W-40 CJ-4 Heavy Duty Motor Oil - 1 Quart Bottle, (Case of 6) Designed to meet manufacturer's latest requirement for 2007 EGR (Exhaust Gas Recirculation) engines using Ultra Low Sulfur Diesel (ULSD) and exhaust after-treatment systems Designed to withstand shear down, viscosity loss and thickening from heavy soot loading and oxidation Peak lubricants provides a complete selection of conventional and heavy-duty motor oils, ATF, gear lubricants and specialty products Each product is designed to provide maximum protection that meets or exceeds U.S. standards, including the latest API SM Service Classifications