The Mobil 1 122491 Delvac 1300 Super Diesel Oil is a high-quality motor oil specifically designed for diesel engines. With a viscosity rating of 15W-40, this 5-gallon bottle of oil provides excellent protection and lubrication for your vehicle. Made in the United States by Mobil Delvac, a trusted brand in automotive fluids, this oil is suitable for use in a variety of diesel engines. Oil and fuel type are very important factors in the overall performance and longevity of your vehicle's engine, making this product a reliable choice for maintaining optimal engine health.