The product is a two-pack of Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil, each gallon in volume. This oil specifically designed for diesel engines offers a higher level of protection and performance due to its full synthetic formula. The oil's viscosity rating of 5W-40 provides excellent lubrication in a wide range of temperatures, making it suitable for various driving conditions. With a warranty not included, users can trust in the quality and reliability of this diesel engine oil for their vehicles.