I have a 2018 Q60 3.0T Luxe AWD. For two and a half years the car has been a real disappointment due to the erratic behavior on the highway, I recently experienced my third ‘flat’ on the run flat Dunlops and it was not fixable. I bit the bullet and bought 4 Yokohama All Season Y rated tires. The car handles perfectly on the highway. No issues. Didn’t want to buy new tires at 6300 miles but well worth it!