Meets requirements of modern 4-stroke recreational engines with or without emission catalyst systems Approved for all 4-stroke applications including Outboard, Sterndrive and InboardExceeds all 4-stroke requirements including FC-W and FC-W Cat CompatibleProvides superior corrosion protection under extreme conditionsIndustry leading wear protection and deposit controlCapitalizing on "ZDDP" anti-wear additive technologyPrevents phosphorous depletion and extends the emission catalyst lifeNMMA FC-W CertifiedFor use in Mercury 4-Cycle Outboard Engines requiring 10W-30 Sold in case packs only