L LittleG Member May 24, 2006 #1 Can anyone tell me why Mercury does not recommend Synthetic Oil in their sterndrives? Mine is a 4.3 MPI and it clerly says do not use Synthetic Oil.
Can anyone tell me why Mercury does not recommend Synthetic Oil in their sterndrives? Mine is a 4.3 MPI and it clerly says do not use Synthetic Oil.
