Saginaw, maybe. Then cool your heels (no pun intended) while you wait 45 minutes to fill er up so you can get to Grayling and do it all over again!
And hope you're not stuck in a snow storm and traffic moving at 25 MPH>
Back in the 80's, I went up north with a friend (280 miles to Boyne City) and it was snow storm all the way. Took us 6 hours to drive up and 8 hours coming home on Sunday....