belairbrian
Petty Officer 1st Class
- Joined
- Aug 21, 2009
- Messages
- 360
So I just bought this boat with a 30hp 4 stroke. seller says he just changed the engine and gear oil. Said he used Sierra synthetic engine oil. Even gave me an extra bottle. Said it was $12 a quart.
So tonite I read the owners manual and find this:
IMPORTANT: The use of detergent oils, multi‑viscosity oils (other than Mercury or Quicksilver NMMA FC‑W
certified oil or a major brand NMMA FC‑W certified oil), synthetic oils, low quality or oils that contain solid additives are not recommended. (emphasis added)
So should I drain and refill, or is this oil fine? The Sierra Full Synthetic has a NMMA FC-W certification.
So tonite I read the owners manual and find this:
IMPORTANT: The use of detergent oils, multi‑viscosity oils (other than Mercury or Quicksilver NMMA FC‑W
certified oil or a major brand NMMA FC‑W certified oil), synthetic oils, low quality or oils that contain solid additives are not recommended. (emphasis added)
So should I drain and refill, or is this oil fine? The Sierra Full Synthetic has a NMMA FC-W certification.