There was a time when Michelin had trouble with a 'zipper' issue where the side of the tire would split.
We had excellent service out of our Michelins on our '08 Dynasty. It had dates codes from 2006 to 4306 and I had them replaced in 2013 with Michelins less than a couple of months old date codes. The tire shop gave me $50 per tire trade-in (Pete's Tire in Coachella, CA).
Our new coach came with Michelins from the factory. We have 365's on the steer and tag and 315's on the drive axle. Michelin is the only tire company making the 365 which is a very wide tire and can carry the 19,000 lb. front axle and where I can run 105-110 psi.
I will replace with Michelins again when the time comes.
Safe travels,
MM.