The 2 PACK Shell Rotella T6 Full Synthetic 10W-30 Diesel Engine Oil consists of two 1-gallon bottles of high-quality full synthetic oil specifically designed for diesel engines. With a viscosity rating of 10W-30, this oil provides excellent protection and performance for your vehicle. The pack of two ensures that you have an ample supply for your engine needs, making it a convenient and reliable option for maintaining your vehicle's health and efficiency.