Originally Posted by GE3G
Get some Amsoil or Royal Purple in that beast
Thanks for the info. I do have a preferred account for Amsoil but have never used it. A friend of mine is a dealer. I'm not a big synthetic fan due to multiple oil analysis's I did on my 98 chevy truck using both synthetic and conventional oil back in the early 2000's and how the truck ran with a synthetic in it. It was noisier, used more oil, and my oil analysis wear results were worse than the conventional oil I was using. I felt I wasn't getting the results I wanted for the money spent so I went completely back to conventional oil and have been happy with it's performance since.
Granted, synthetic oils as well as all oils in general have improved since that time, but I have never read on the bobistheoilguy website in the oil analysis section where synthetic oils performed that much better than conventional.
I may change my mind at a later date but who knows. As far as using a heavier viscosity, I'm undecided on that and need to do some more research before I feel comfortable deviating from Ford's recommendations. Everyone says that there are no internal differences between the Mustang track pack cars that require 5W-50 and the regular GT cars that require 5W-20 so I guess a heavier weight would not hurt my regular GT if that info is true.