We just bought a new 2013 GT Mustang,stick, would you guys stay with Motorcraft or change? Also thinking of synthetics and read somewhere(can't remember where), that there is only a few "true" synthetics left. I know two questions, but would you stay with Motorcraft or go synthetic? Wife will commute 30 miles 1 way 5 days a week mostly 50-60 mph. On weekends I will play. It will see high revs and speed until I get busted too much. Also, lengthy vacations. Thinking of Amsoil but never tried it. Any input on true synthetics or what you would run are greatly appreciated. Thanks, Travis.