Wondering if anyone is running synthetic oil in an older outboard, mine is a 1996 90hp Johnson. I guess I am look for something maybe cleaner and less smoking, any brand better than the other, using Johnson oil now.  Also what spark plug is everyone running. I did a  little Googling and it seems like most people like Champion plugs. I am running NGK. Is the Champion a hotter plug or better plug for my motor?

I've been running quicksilver synthetic in my 97 since it came out and I noticed it was the same price. No real difference noticed, maybe a little less smoke but smoke is normally due to over mixing your oil. I also use champions but only because that's what my engine calls for. Nothing wrong with NGK or any other brand for that matter although I have had issues with Bosch plugs. 

I only run two oils.  I run the OEM XD-50 in my 225 FICHT DFI motor and Pennzoil 100% synthetic in all the other dozen carbureted motors that are anywhere between 1960, 2hp and highly modified 1997 3.0, 325hp V6 Johnson .  DFI motors I only run the OEM recommended oils.

 

Spark plugs, I usually always run the OEM recommended, even in my vehicles.  The older Johnsons always get Champion.  If for some reason I do have to vary from that, it's usually to run NGK or Denso, Laser Iridiums if the ignition system will handle them.   

2 hours ago, Way2slow said:

I only run two oils.  I run the OEM XD-50 in my 225 FICHT DFI motor and Pennzoil 100% synthetic in all the other dozen carbureted motors that are anywhere between 1960, 2hp and highly modified 1997 3.0, 325hp V6 Johnson .  DFI motors I only run the OEM recommended oils.

 

Spark plugs, I usually always run the OEM recommended, even in my vehicles.  The older Johnsons always get Champion.  If for some reason I do have to vary from that, it's usually to run NGK or Denso, Laser Iridiums if the ignition system will handle them.   

this......