Re: What kind of oil should I use?
You have to change the oil every 5k to maintain the warranty. M1 every 5k is overkill and expensive but if if that's what you feel comfortable with then use it. Again, to satisfy your warranty you should use 5W20. M1's 0W20 also meets the Ford spec: WSS-M2C930-A so you can use that too.
If you want to save $ any name brand 5W20 will protect quite well. Best "bang for the buck" oils are Motorcraft, Pennzoil and Havoline on sale/rebate for under $2.00/qt.
'06 Fusion - Black, 2.3/5 speed manual
SCT X3 (Steeda 93 tune)