My wife just got a 2010 Ford Mustang GT with the 4.6 engine and 44K miles. I went to Wally Mart and got a Fram Tough Guard oil filter (silver can) and some Motorcraft semi-synthetic oil in 5W-20 (this weight is what Ford recommends). Is this a good combination and is this filter good? What's everybody running in their Ford modular? How long can I go on an oil change? I'm planning on 5-6K miles. I tried a search and just got frustrated as I couldn't find anything. Forgive my ignorance as I'm new to the world of Ford, but it seems like they should use at least 5W-30 in a high performance car. I haven't owned a Ford in almost 30 years.