Clean oil is essential in reducing friction and preventing damage to internal components, providing many years of engine life. Engineered for sterndrive and outboard applications, this 4-stroke synthetic blend 25W-40 mar...

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Clean oil is essential in reducing friction and preventing damage to internal components, providing many years of engine life. Engineered for sterndrive and outboard applications, this 4-stroke synthetic blend 25W-40 marine engine oil has been extensively tested to ensure impressive protection against corrosion and wear. Exceeds all marine industry 4-stroke oil requirements including FC-W and FC-W Catalyst Compatible.

The Quicksilver brand is the leader in delivering uncompromising engine oils, parts and accessories to the marine industry for over 65 years. Quicksilver is the premier supplier of Mercury Marine Original Equipment replacement engine parts, oils, and accessories, but also works to serve all Original Equipment brands in the marine and powersports industries. It has earned a loyal following by providing the highest quality products that are tested through some of the most rigorous environments and testing procedures. No aftermarket company comes close to the level of research and design as Quicksilver; buying Quicksilver is buying performance, protection and peace of mind.



  • Direct replacement for Mercury Marine 858058K01
  • Provides maximum protection against excessive wear, corrosion and pitting for extended gear life in marine applications
  • Contains additives to protect gears if water enters the gear case or lower unit
  • Recommended for use in outboard motor gear cases and marine lower units in applications below 75hp
  • 80W-90 viscosity
  • 32 oz. bottle (pack of 6)
  • Produced to meet Mercury Marine original equipment manufacturer specifications to best protect your engine
  • Direct replacement for Mercury Marine 858058K01
  • Provides maximum protection against excessive wear, corrosion and pitting for extended gear life in marine applications
  • Contains additives to protect gears if water enters the gear case or lower unit
  • Recommended for use in outboard motor gear cases and marine lower units in applications below 75hp
  • 80W-90 viscosity
  • 32 oz. bottle (pack of 6)
  • Produced to meet Mercury Marine original equipment manufacturer specifications to best protect your engine

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