Quicksilver 10W-30 4-Stroke Marine Engine Oil — 1 Gallon, blended synthetic protection for outboards & sterndrives

Quicksilver 10W-30 4-Stroke Marine Engine Oil (1 gallon) is a premium blended oil formulated to protect and prolong the life of 4-stroke outboard, inboard and sterndrive marine engines.

Clean, correctly formulated oil is a cornerstone of reliable marine power. This Quicksilver 10W-30 marine engine oil combines synthetic and high-grade mineral base stocks with additives tailored for the unique demands of saltwater and freshwater operation. It meets and exceeds widely accepted marine specifications for 4-stroke engines, offering robust protection against wear, shear, and corrosion while maintaining stable viscosity under operating temperatures.

How does this oil protect engines in corrosive marine environments?

The additive package is designed to form protective films on metal surfaces and neutralize corrosive byproducts, helping prevent pitting and rust commonly caused by humidity and salt exposure.

• Corrosion inhibitors target water and salt-induced oxidation
• Detergents keep metal surfaces clean to reduce acid formation
• Film strength additives limit metal-to-metal contact under load

Will this oil work in my 4-stroke outboard or sterndrive engine?

Yes — Quicksilver 10W-30 is formulated specifically for 4-stroke marine outboards, sterndrives and inboard engines and is compatible with mixed fleet use when 10W-30 viscosity is required.

• Designed for marine OEMs and aftermarket service
• Suitable for both freshwater and saltwater operations
• Manufacturer part number 8M0078617 for easy cross-reference

How does the 10W-30 viscosity benefit performance?

10W-30 viscosity provides a balanced flow at cold starts while retaining protective thickness at operating temperatures, which helps maintain hydraulic stability and wear protection across typical marine temperature ranges.

• Good cold-start pumpability for quicker oil pressure recovery
• Stable shear resistance to preserve viscosity under load
• Helps maintain consistent lubrication across RPM ranges

What maintenance improvements can I expect using this oil?

Routine use of a quality marine oil reduces component wear and sludge buildup, contributing to longer service intervals and more reliable performance between maintenance events.

• Cleaner combustion chamber and valve train areas
• Reduced piston ring and bearing wear over time
• Enhanced engine life when combined with proper service practices

Who is this for? Boat owners, fleet managers and marine technicians seeking a dependable 4-stroke oil that meets marine engine manufacturer expectations will find this Quicksilver 10W-30 an appropriate choice. It is especially useful for vessels operating in challenging conditions where corrosion resistance and consistent viscosity matter, and for anyone preferring OEM-grade products backed by a brand with a long history in marine engine care. Choose this 1-gallon container for service intervals on small to mid-size engines or as shop stock for routine oil changes.