I want to run synthetic in my '08 f150 (5.4l). If they were the same price, which is the best oil for year round use out of Mobil 1, PP or Synpower,etc. . The truck sees highway miles, towing, and sometimes sets for a week at a time. I plan to keep this truck a long time and I believe that the extra protection will make a difference down the road. I know that MC blend is good but I can buy a "full"(and maybe a little better)synthetic for just a bit more. I am not interested in mail-order oil, just something I can get at WM or any parts store.