1988 3.7 merc 170 hp engine oil type

[chrisss72]

I know this engine will use 25w40 motor oil which i believe is synthetec. I would like to go to autozone and run regular oil. I plan on doing the engine oil change every year. What grade should I use? Thanks!

 

[Don S]

Re: 1988 3.7 merc 170 hp engine oil type

If you don't want to use what the manufacturer suggests, then here are a few links to other oil threads to help assist you in choosing your oil.

They all come down to the same thing, people posting something like
"I use ___(Fill in the blank)___ and it works great"

http://forums.iboats.com/showthread.php?t=451752

http://forums.iboats.com/showthread.php?t=445976

http://forums.iboats.com/showthread.php?t=436377

http://forums.iboats.com/showthread.php?t=300620

http://forums.iboats.com/showthread.php?t=426361

http://forums.iboats.com/showthread.php?t=423766

http://forums.iboats.com/showthread.php?t=357663

http://forums.iboats.com/showthread.php?t=319916