Shell Rotella T6 5W-40 Full Synthetic oil motor features an advanced, multifunctional, low-ash additive technology in a synthetic base motor oil designed to provide highly responsive protection that continuously adapts to your driving conditions. Shell Rotella T6 5W-40 full synthetic motor oil uses selected low-viscosity synthetic base oils to further energize the oil's protective capability that promotes fuel-economy performance with no compromise in durability.