Maxima Marine Pro is a petroleum based 2-cycle oil specifically formulated for watercraft and outboard motor service Marine Pro is an outstanding lubricant with enhanced rust & corrosion protection, anti-scuff/anti-wear protection and special additives to prevent ring sticking and carbon formation Ashless additive system exceeds NMMA TC-W3 specs and API TC standards and keeps vital engine parts clean while preventing piston & cylinder scuffing Blends easily as a premix or for use in oil injection systems Environmentally safe and provides excellent rust & corrosion protection