Use Motorcraft oil, 75W90, XTM5QS. It runs around $20 @ quart but is very popular with MS3 owners on this forum. My MS3 requires 2.6 quarts per manual, so buy 3 quarts.
I've used XT-M5-QS and Redline MT90, both are exceptional products and will get the job done.
Redline doesn't help in cold weather. I have it in mine and can't wait to change over to Motorcraft xt-m5-qs!Drain it and put in Redline MT90. You'll love the difference.