Want to know more about how your engine is breaking-in or wearing? Curious about whether or not your oil is doing its job? Want to be ahead of problems that may develop? PartsVu has partnered with Blackstone Laboratories and we are now offering professional oil analysis kits. Results are typically received in a few days via email. Shop now. LUB-2STRK-M1-12 - 12-pac - 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.