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Add to CartSierra 10W-40 FC-W 4 Stroke engine oil is a semi synthetic blend that has been formulated to provide superior protection for outboard engines. The proprietary blend of conventional with synthetic lubricants allow this oil to keep your engine running smoothly under high loads and running stresses.
*Do NOT mix with gas. Not for use in 2 cycle pre-mix, injected engines, inboards/sterndrives equipped with catalytic converters
It varies model to model, check out our Engine Oil Capacity Guide for more information and capacity charts!
18-9551-2 - Quart
18-9551-3 - Gallon
What is Sierra FC-W 10W-40 4-Stroke Semi Synthetic Marine Oil used for?
Sierra FC-W 10W-40 4-Stroke Semi Synthetic Marine Oil is formulated to provide protection for outboard engines. Its blend of conventional and synthetic lubricants is designed to help the engine operate smoothly under high loads and running stresses.
Is Sierra FC-W 10W-40 Marine Oil a 4-stroke engine oil?
Yes. Sierra FC-W 10W-40 is a 4-stroke marine engine oil. It is not intended for 2-cycle pre-mix or injected engines, and the product description specifically states that it should not be mixed with gasoline.
Can Sierra FC-W 10W-40 Oil be used in inboard or sterndrive engines with catalytic converters?
No. The product description specifically states that Sierra FC-W 10W-40 should not be used in inboard or sterndrive engines equipped with catalytic converters. Verify your engine's oil requirements before use.
Does Sierra FC-W 10W-40 Marine Oil meet NMMA FC-W and API-SL requirements?
Yes. Sierra FC-W 10W-40 4-Stroke Semi Synthetic Marine Oil is NMMA FC-W certified and carries an API-SL rating. The oil is formulated as a semi-synthetic blend of conventional and synthetic lubricants.
Is Sierra 10W-40 FC-W Marine Oil a replacement for Suzuki outboard oil?
Yes. Sierra 10W-40 FC-W Marine Oil is listed as a direct Suzuki replacement. Quart part number 18-9551-2 replaces Suzuki 990C0-01E30-QUA and 990C0-10W40-1QT, while gallon part number 18-9551-3 replaces 990C0-01E30-GLN and 990C0-10W40-1GL.
What sizes of Sierra FC-W 10W-40 Marine Oil are available?
Sierra FC-W 10W-40 4-Stroke Semi Synthetic Marine Oil is available in quart and gallon quantities. The quart is part number 18-9551-2, and the gallon is part number 18-9551-3.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
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