Quicksilver 25W-40 Synthetic Blend 4-Stroke Marine Engine Oil

Quicksilver 25W-40 Synthetic Blend is engineered specifically for marine engines, providing maximum protection and performance for your boat. This semi-synthetic oil has been tested in the harshest conditions to ensure stable viscosity and reliable lubrication from idle to wide-open throttle. With Quicksilver 25W-40, your engine runs smoother and cooler, and is shielded from corrosion during both operation and storage. It is suitable for both high-power outboard motors and inboard (sterndrive) engines in yachts and powerboats.

• High Load Performance: Ideal for engines that run for extended periods at high RPM – such as speedboats and sport cruisers – ensuring reliable lubrication even under heavy stress and prolonged high-speed operation.
• All-Season Protection: The formula retains its protective properties in summer heat and facilitates easy cold starts at the beginning of the season. The oil resists excessive thinning at high temperatures and maintains good viscosity for cold cranking in low temperatures.
• Manufacturer Approved: Quicksilver 25W-40 Synthetic Blend is officially recommended by Mercury for MerCruiser inboards and Mercury outboards, meeting warranty requirements and OEM quality standards. You can trust it to meet or exceed the engine manufacturer’s specifications.
• Multiple Packaging Options: Available in a handy 1L bottle – perfect for top-offs and small engines – and a larger 4L jug for full oil changes on bigger engines or servicing multiple motors at once.
• Uncompromising Quality: Developed by Quicksilver (Mercury Marine) with over 65 years of expertise, this oil helps extend engine life and provides peace of mind on every voyage. You can be confident your engine is getting top-notch protection in all conditions.