I've used M1 with Puralator PureOne filer in all my vehicles for the last 15 years with good results but with the Focus Ford is changing the oil every 5000 miles for the next couple of years. After that I'll switch to synthetic.
'12 Focus Red Candy SE Sport 5 spd
'99 Toyota 4Runner Sport
'11 Subaru WRX STI Hatch