I'm doing the regular fluid changes and maintenance in my 7.4MPI. What motor oil should I be using. I read that regular motor oil doesnt give you corrosion protection like marine oil does. Other articles I've read say that Mobile1 does provide this protection. Everybody says something different. What do you guys use or suggest. Also what about the fluid in the drive. Should I use the Quicksilver brand or Mercruiser brand? What about some of the other high perfromance lubricants on the market? Thanks.