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Joe Gibbs Driven MR50 is high performance marine oil with the extra that your engine needs. MR50 performance motor oil is more than extra anti-wear protection--it's a defense against moisture! Joe Gibbs Driven motor oil blends an advanced synthetic formula with a high zinc content, plus rust and corrosion inhibitors, to deliver the right protection for your high-output marine engine for both boating season and winter storage. Protect aggressive cam profiles, guard against rust, and defend against ethanol blended fuel with the right oil--Joe Gibbs Driven MR50 marine high performance oil.