I wish I had good mileage records for mine. The problem is, I go through front tires like it's my job. Rear tires last for ever, so I swap front to back. The problem is, while I had the Azenis RT-615 on my car, the rear suspension alignment was borked and I drove on a 2k mile road trip like that which kinda ruined them. And the fronts didn't last too long either for obvious reasons...
From what I've seen of other vehicles running them, I would bet they would last you two seasons even driving on the highway that much... But that's just a guess.