Marine engines equipped with catalytic converters have specific oil requirements. Some marine-grade oils on the market contain high levels of phosphorus. Long-term exposure to these oils will damage catalytic converters--which may not be covered by your warranty. Quicksilver Full Synthetic 4-Cycle Stern Drive & Inboard Engine Oil contains low levels of phosphorus, reducing potential damage to the catalyst and can be used on any stern drive/inboard engine equipped with or without a catalytic converter. This fully synthetic 4-cycle oil keeps dirt and deposits from settling on metal surfaces, reduces oil consumption compared to conventional oils, resists thermal breakdown and oxidation and provides exceptional rust protection.
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