Designed for 4-stroke applications, the Lucas Oil Synthetic SAE 10W-30 Outboard Engine Oil features an additive package to help improve wear protection and catalyst life and rust and corrosion protection in freshwater and saltwater environments. Safely blends with synthetic and nonsynthetic oils. Meets JASO MA and API SM standards. Water-resistant. Lucas Oil Synthetic SAE 10W-30 Outboard Engine Oil - Oil And Lubricants at Academy Sports