Oil 4 stroke Mercury 115hp

[Captf22]

4 stroke oil, New Mercury 115hp 10w-30 or 25w-40 Synthetic Blend any opinions?

 

[Chris1956]

That motor likely requires a FC-W oil. Any oil rated as such is acceptable. Automotive multivis oils are generally not recommended.

 

[jimmbo]

Welcome to iboats
Mercury markets several Oils for your engine. Can't go wrong with them, especially during the Warranty Period.
As mentioned above, avoid Auto Oils if you can, as they are speced/blended for Auto/Light Truck Engines, and Marine Engines operate in under different conditions

 

[racerone]

Motors are too expensive to skimp on oil.-----Use the factory recommended product.