I should know better than starting an oil thread but here goes anyway..... I am thinking of switching my 1992 7.4 merc with 700 hrs from dino to synthetic oil. Synthetic is at the top of Mercs recommended list. I have heard you may cause trouble (ie. leaking seals) by switching from dino to syn on an older motor.
My 7.4 runs great and I want to do all I can to keep it that way. Opinions ?
My 7.4 runs great and I want to do all I can to keep it that way. Opinions ?