Prime Guard QUIK8M0078617 Quicksilver 8M0078617 10W-30 4-Stroke Marine Engine Oil 1 Gallon

Prime Guard QUIK8M0078617 is a repackaged/aftermarket-equivalent supply of the Quicksilver / Mercury Marine 8M0078617 10W-30 4-Stroke Marine Engine Oil, sold in a convenient 1-gallon container. This mineral-based, FC-W certified engine oil is purpose-built for 4-stroke marine applications, delivering reliable protection for outboard and sterndrive engines.

This 10W-30 marine oil features a specialized additive package designed specifically for the demands of marine engines, where moisture, corrosion, and sustained high-RPM operation require more than a standard automotive oil can provide. It meets and exceeds all marine industry 4-stroke oil requirements, including FC-W and FC-W Catalyst Compatible certifications, making it safe for use in engines equipped with catalytic converters.

Key Features:

• Viscosity: SAE 10W-30 — suitable for a wide operating temperature range
• Formulated with premium-grade mineral and synthetic-blend base stocks
• Exceeds FC-W and FC-W Catalyst Compatible marine industry standards
• Provides outstanding corrosion and wear protection for internal engine components
• Helps maintain peak engine performance and eliminates thermal breakdown under extreme RPM, temperatures, and loads
• Cleaning additives and inhibitors reduce scuffing and scoring of pistons and cylinder walls
• Safe for use in engines with or without catalytic converters
• Sold in a 1-gallon (128 fl oz) container
• OEM Cross-Reference: Mercury / Quicksilver 8M0078617 / 92-8M0078617

Recommended for all Mercury and MerCruiser 4-stroke marine engines including outboard and sterndrive (I/O) applications. Continued use helps extend engine life by reducing friction, preventing internal component damage, and ensuring clean, effective lubrication across demanding marine conditions.