Mercury 8M0078014 – 25W‑50 High-Performance 4‑Stroke Marine Engine Oil, 1 Gallon

OEM Mercury Racing oil for high-output 4-stroke marine engines – built for extreme performance, durability, and full warranty protection.

Product Overview

Mercury 8M0078014 is a 25W‑50 synthetic blend marine engine oil, engineered for high-horsepower Mercury Racing 4-stroke engines, including Verado, FormulaRace, and 525 EFI through 1650 sterndrives. It delivers maximum wear protection, corrosion resistance, and thermal stability in the most demanding marine applications.

Formulated to maintain viscosity, prevent sludge and varnish, and meet or exceed NMMA FC-W standards, this oil is built for high-RPM and high-heat engine environments where standard marine oils may fall short.

Key Features

• OEM-approved by Mercury Racing for 4-stroke outboards and high-performance sterndrives
• 25W‑50 viscosity handles elevated engine temps and heavy loads
• Ideal for Verado, FormulaRace, and 525–1650 EFI engines
• FC-W marine engine oil certified – exceeds warranty specs
• Protects against rust, varnish, and sludge formation
• Outperforms standard marine oils in high-output marine environments
• Supplied in a 1-gallon (3.78 L) container
  

Engine Compatibility

Perfect for Mercury Racing 4-stroke engines, including:

• Verado supercharged outboards
• FormulaRace series
• Mercury Racing sterndrives: 525 EFI, 600 SCi, 700 SCi, 850 SCi, 1075 SCi, 1350, and 1650

Refer to your engine’s owner’s manual for specific guidance.