The Michelin Primacy MAV4 must be a really new tire. Looking at the tire rack site, the customer reviews only had from 200 to 1000 miles on each report. It is not listed yet in the Grand Touring All-Season Survey Results.

Looks like this tire is very similar to the S8. Each tire shows to weigh one pound more. They may last longer as the UTQG shows a higher number.

Use the tirerack.com/ site. Choose, tires by brand, michelin to read more details on this new tire.