4 stroke oil, New Mercury 115hp 10w-30 or 25w-40 Synthetic Blend any opinions?
C Captf22 Recruit Joined Apr 10, 2026 Messages 1 Wednesday at 5:21 PM #1 4 stroke oil, New Mercury 115hp 10w-30 or 25w-40 Synthetic Blend any opinions?
C Chris1956 Supreme Mariner Joined Mar 25, 2004 Messages 28,680 Wednesday at 5:59 PM #2 That motor likely requires a FC-W oil. Any oil rated as such is acceptable. Automotive multivis oils are generally not recommended.
That motor likely requires a FC-W oil. Any oil rated as such is acceptable. Automotive multivis oils are generally not recommended.
