Aeroshell W Multigrade 15W-50 is an antiwear, ashless, dispersant, semi-synthetic oil. It is fully approved in all Lycoming, Continental, and Pratt & Whitney aircraft piston engines. Reduces engine wear, fuel consumption, and oil consumption. Helps engines start faster & eliminates need for seasonal oil changes. Contains additive LW16702 which reduces engine wear and corrosion. Ideal for operations in mild to warm temps.