Hello All,
I have 2001 4.3 Liter Mrecruiser I/O. I know all the Merc manuals all
say use only the Merc brand oil, but I want to know if using Mobil 1
synthetic will be better for the engine (since it is in a Blazer or S-10!!)
I know Merc wants to sell oil, but are there any cons to using synthetic
instead of the Merc dinosaur juice? Thank you in advance.

Jerry