Summary: I only got 40,000 miles out of my tires but they lasted almost 8 years. I noticed some cracks on the sidewall and my car was a little bumpy in the front end so I took it took it into my tire guy. I have been buying tires from the same dealership for 30 years because I know my tire guy knows his stuff. We found out that two of the 4 tires had started to separate and that was giving me the bounce in the car.
Summary: I have always bought Michelin tires for my vehicle. They provide the safety and a comfortable ride. I am always offered cheaper deals with other brands but I choose to stay with Michelin. I put a lot of highway miles on my car and want the comfort. I haven't noticed any change in the gas milage with my tires, even with the nitro filled. I usually buy a set of tires every two years and the cost is around a $1000 per set. So I wish for better pricing deals.