I just bought a 2006 Grand Prix GT (supercharged) a few months ago. It has 72k miles on it now. The previous owner was a GM engineer and gave me all the service records. She went to the same oil place since the car was first bought and was changed around ever 7k miles with "Shell Formula GF-5 Synthetic". I just did my first oil change on the car with Pennzoil Platinum and a FRAM Ultra oil filter. I had a 99 grand am before this car, I used that same oil/filter combination and that car drove like a champ. Anything I should do differently with the Grand Prix?