First of all hello everyone I'm receiving my new toy at the end of this month which is a 2009 Candy Apple Red Premium GT. The only other Mustang i've owned was a '79 coupe back in high school and I think it's about time for another I've been reading all of the threads on here and have done some research but would like some more info from those who have "been there done that" some with the S197 and that is the kind of oil that is best. All of the research i've done seems to be based on personal preferance. I'm leaning towards a synthetic but as far as weight/brand i'm wondering what is best? The only substantial tidbit i've come across is that there is a line of synthetics out there that is not truly synthetic (Castrol GTX primarily as I found a lawsuit about it). I want the best for my new toy thus the question. Thanks in advance for any tips!