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Sierra International 18-9400-4 25W-40 FC-W 4-Stroke Marine Stern Drive Oil is a premium blend oil designed for optimal lubrication and corrosion protection in marine engines. With excellent low-temperature properties and certification from NMMA FC-W, this oil is perfect for Mercury and OMC engines, ensuring your vessel runs smoothly in any condition.
J**N
It's oil ....
It's oil, I'm sure it will work just fine. However, if for some reason my engines burn up that I'm going to use it in, I'll update this review.
C**S
Great purchase
Pretty good deal
S**.
Five Stars
perfect for 4 stroke marine engines
B**P
Marine Mercruiser Lubricant - 25w40
This is the new recommended weight, 25w40, for Mercruisers. Have not changed my oil yet but it is marked specifically for marine use. The automotive grades are not equivalent to marine applications.
M**0
Hard to find unless I used a marina
This oil works great and it was much cheaper than going to the local Marina. The only part I didn't like was the cost of shipping.
W**T
Perfect, just as expected,
Perfect, just as expected, Better value than Mercury. I'll be getting this in the future. Excellent value and reduces my costs.
T**Z
Five Stars
Good price
D**D
Oil I needed.
Great price and fast shipping.
Trustpilot
4 days ago
1 month ago