Rob,
I just sold my 1999 Taurus with the 24V.
150,000 miles with no problems using Motorcraft FL820S and Havoline Dino 5W-30 every 5,000 miles. Always passed emissions and used 1/2 quart of oil between changes.
Not trying to change your mind on the M1, just pointing out that your 24V is a stout motor that will go the distance.