Quicksilver 4-Stroke Marine Engine Oil is mineral-based and recommended for use in all 4-stroke marine outboard, stern drive, and inboard engines. Available in a variety of weights, this lubricant meets or exceeds all marine engine manufacturer's warranty requirements and recommendations for use of an FC-W marine engine oil. It maintains its viscosity, protects against varnish buildup and sludge formation, and exceeds the rust protection requirements for NMMA certification. See your owner's manual or service manual for specific applications and instructions.

* Provides outstanding wear and corrosion protection to help extend engine life
* Industry-leading strength and viscosity retention
* Eliminates thermal breakdown under extreme RPM
* Available in numerous volume/sizes