LUB-2STRK-M1-12 - Outboard semi-synthetic marine engine oil that's an outboard industry approved NMMA TC-W3 formulation. With our exclusive additives, we meet or exceed the industry standard when it comes to guarding against power robbing ring stick and carbon build up, while providing superior anti-wear and anti-corrosion protection in the harsh marine environment. Not recommended for land based products, WaveRunner or Sport Boats.