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Add to CartSierra 10W-30 Synthetic Blend Engine Oil is formulated specifically for 4-stroke outboard and sterndrive engine technology. The special blend of synthetic base oil and a balanced additive system exceeds FC-W requirements and provides excellent protection at high temperatures. This superior protection works under heavy engine loads and offers faster lubrication at start up.
Note: Do NOT mix with gas - NOT for use in 2 cycle premix or injection engines.
Features:
What is Sierra 10W-30 4-Stroke Synthetic Marine Oil used for?
Sierra 10W-30 4-Stroke Synthetic Marine Oil is formulated for 4-stroke outboard and sterndrive engines. Its synthetic blend and balanced additive system provide protection at high temperatures and under heavy engine loads while supporting faster lubrication at startup.
Can Sierra 10W-30 4-Stroke Synthetic Marine Oil be used in 2-stroke engines?
No. Sierra 10W-30 4-Stroke Synthetic Marine Oil is not for use in 2-cycle premix or injection engines. The product description specifically states not to mix this oil with gasoline.
What applications is Sierra 10W-30 4-Stroke Synthetic Marine Oil recommended for?
Sierra 10W-30 4-Stroke Synthetic Marine Oil is recommended for both outboard and sterndrive applications. It is formulated specifically for 4-stroke outboard and sterndrive engine technology.
What certifications does Sierra 10W-30 4-Stroke Synthetic Marine Oil have?
Sierra 10W-30 4-Stroke Synthetic Marine Oil is NMMA FC-W Certified and meets API-SL specifications. The product description also states that its synthetic blend exceeds FC-W requirements.
How does Sierra 10W-30 4-Stroke Synthetic Marine Oil perform at high and low temperatures?
The oil provides protection at high temperatures and under heavy engine loads. It also offers faster lubrication at startup in low temperatures, helping provide lubrication when the engine is started.
What sizes are available for Sierra 10W-30 4-Stroke Synthetic Marine Oil?
Sierra 10W-30 4-Stroke Synthetic Marine Oil is sold in quart and gallon sizes. The appropriate amount varies by engine model, so verify the oil capacity for your specific engine before servicing.
It varies model to model, check out our Engine Oil Capacity Guide for more information and capacity charts!
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
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