Sierra FC-W 4-Cycle Outboard Synthetic Blend Oil

Sierra FC-W 4-Cycle Outboard Synthetic Blend Oil is a 25W-50 marine engine oil. It is made for four-stroke outboard engines that run at high RPM and carry heavy loads. The synthetic blend (semi-synthetic) formula combines Group II base stocks with synthetic base oil. It is meant to protect the engine in demanding marine conditions. Sierra designed it to meet or exceed engine manufacturer specifications, so it can be used as a replacement for OEM-branded four-stroke outboard oil.

Key Features:

• NMMA FC-W certified and API SL service category. The oil is registered with the NMMA's four-stroke marine oil certification program.
• Synthetic blend formulation with 25W-50 viscosity for protection under high loads and operating stress.
• Marine-specific additive package for corrosion protection, high detergency, anti-wear and anti-oxidation.
• Helps keep the engine clean. It reduces deposits, piston ring sticking and wear on internal components.
• Rust and corrosion protection for the moist, harsh marine environment.
• For use in outboard and inboard engines without a catalytic converter.

Four-stroke marine engines need an oil built for boating duty, not a standard automotive oil. This oil gives dependable lubrication and engine protection for regular maintenance and oil changes. It is backed by Sierra's marine parts reputation.