complete and udder BS. if that was the case then NO car would come from the factory with synthetic oil. ALL of BMW's line comes with syn i believe as well as MB, and even the little ol chevy corvett comes with syn from the factory and have NEVER seen a drop of dino oil prior to being shipped to the dealers.As far as going synthetic, I was told to wait till 10,000 before going Syn by many Nissan Tech's. They say the valves are not fully seated and Syn being so fine, it might leak by.
Mobil is notorious for making engines noisier. It protects well though. I switched to synthetic at 600 miles, and change it every 6000. I use whatever brand synthetic is on sale when I need a change.Went to Mobil 1 at 750 miles. Hoping it would quiet the motor, it didn't, but syn is the way to go IMO.