Sierra 18-9552-8 25W-50 Semi-Synthetic Marine Engine Oil - 1 Liter

Sierra 18-9552-8 is a premium semi-synthetic marine engine oil formulated specifically for the demanding conditions of marine applications. This 1-liter bottle of 25W-50 weight oil provides superior protection for inboard and sterndrive engines operating in harsh saltwater and freshwater environments.

Key Features:

• 25W-50 viscosity grade for optimal protection across wide temperature ranges
• Semi-synthetic formulation combines conventional oil benefits with synthetic performance
• Enhanced protection against rust, corrosion, and moisture damage
• Superior thermal stability for extended drain intervals
• Excellent wear protection for critical engine components
• Designed for both gasoline and diesel marine engines
• Meets or exceeds FC-W requirements for marine engine lubrication

This marine-grade engine oil is engineered to handle the unique challenges of marine environments, including water contamination, salt exposure, and frequent temperature cycling. The 1-liter size is convenient for topping off or servicing smaller marine engines. Sierra marine oils are trusted by boaters and marine technicians for reliable engine protection and performance.