Mercury 8M0078626 – 10W‑30 Mineral 4‑Stroke Marine Engine Oil, 1 Gallon

OEM Mercury Marine mineral oil for 4-stroke engines – reliable protection with FC-W certification and excellent viscosity retention.

Product Overview

Mercury 8M0078626 is a SAE 10W‑30 mineral-based marine engine oil, recommended for use in all 4-stroke outboards, sterndrives, and inboards. Ideal for Mercury and other leading marine engine brands, this oil provides industry-leading wear protection, corrosion resistance, and viscosity retention—ensuring long engine life under demanding marine conditions.

This formulation meets or exceeds all OEM warranty standards, including FC-W and FC-W Catalyst Compatible certifications. Comes in a 1-gallon (3.78 L) bottle for convenient engine maintenance.

Key Features

• Designed for 4-stroke Mercury, MerCruiser, and other top marine engines
• SAE 10W‑30 mineral formula – great for a wide range of marine temps
• Certified FC-W & Catalyst Compatible for warranty protection
• Excellent protection against wear, corrosion, and breakdown
• Maintains viscosity in high-stress, high-RPM marine operation
• Packaged in a 1-gallon (3.78 L) bottle

Engine Compatibility

• Mercury 4-stroke outboards
• MerCruiser inboards & sterndrives
• Compatible with other major 4-stroke marine engine brands

Always refer to your owner’s manual for application details.