Home Forums Fishing Freshwater Synthetic or conventional mixing oil ?

I have a 22 yr old Merc 25. I ran it for years with the cheap oil but it smelled so bad I switched. I went to Amsoil 100/1 . It was much better but one day I got a pint of Merc TCW3 and used it and thought it smelled even less so I stayed with that the last 5 yrs. i run it 2 oz. per gallon and that is somewhat lean at 64/1. I read in a merc owners manual that it is safe to run 100/1 if used a lot i warmer weather . I did 100/1 on my old Merc and never had a problem with the engine. I figured the price of Merc TCW3. is cheap so I stick with it.