Motorcraft® SAE 15W-40 Super Duty Diesel Motor Oil is a high-quality light and heavy-duty diesel engine oil recommended by Ford Motor Company. It is particularly recommended for use in Ford vehicles equipped with Power Stroke® Diesel engines, as well as in other diesel engine applications where the manufacturer recommends an oil of this viscosity grade and quality. It meets Ford WSS-M2C171-F1, required for use in Power Stroke® Diesel engines designed to meet 2017 on-highway exhaust emission standards and requiring ultralow sulfur diesel fuel as well as meeting the requirements for previous model year diesel engines.