my sugestion is exactly what manicrodder said. use the A schedule AND synthetic.
that's exactly what I have been doing on my '99 Jeep Grand Cherokee 4.7 L since I purchased new in 3/99.
my drive to work is 1.5 miles, but who's to say whether schedule A or B is operative, but you, the owner.
you're not going to have anything but a clean crankcase with the Mobil 1
being nuts about car oil/changes, I'm now considering moving to a larger filter for my Jeep, as it appears the Motorcraft FL1A is a perfect fit, but larger- appears it will take me from 6 qts to 6 1/2, but would not be a problem as I change the oil myself on all our family vehicles, m/c, lawn motors, blower, etc.