Lucas Synthetic SAE 10W-40 marine outboard engine oil for boats and watercraft Excellent for use with supercharged, turbo charged or nitrous oxide high performance engines Protects against rust and moisture during long periods of storage Safely blends and is compatible with synthetic and non-synthetic oils Provides rust and corrosion protection in both fresh water and salt water environments Effective water resistance Long Lasting Resist extreme pressure Extreme friction reducer Contains a special additive package to improve wear protection and increase catalyst life in newer outboards using catalytic converters NMMA® Certified to meet or exceed FC-W (CAT) performance Meets JASO MA standards for air-cooled motorcycles and all-terrain vehicles Meets industry standard API SM (automotive) 10W-40 viscosity