I have an update on this thread. Originally, I chimed in to report that I was having the same snow tire type of noise as others had reported here. This had been increasing over time, and I had reported it to the dealer on a number of occasions. I had been diligent about rotations and balance, doing so between every 5-6,000 miles, and I am a pretty mellow driver, so I could not understand that this could happen to a new car that had been cared for properly.
After my original post, I scheduled my 20,000 mile service and an inspection of everything. At the dealer, I discussed alternatives, including those stated in our forum, with my Service Advisor. After inspection, he informed me that I had two tires that had not worn evenly. I elected to perform a new alignment, dismount and reversal of the tires on their rims, and rotation and balance of the tires. My SA told me that, if this didn't work, he would contact Ford.
This definitely improved the situation. I went from always hearing the noise to the problem occurring mostly on the smoothest surfaced roads. However, the problem persisted at highway speeds and on certain surfaces more than others.
By this time, Meagan and I connected and discussed things. She had reached the Regional Service Manager for my area, and he now contacted me about the situation. Next, the RSM, after conferring with my SA, confirmed that I have two tires that are out of round due to uneven wear. I was offered, and I accepted, to pay a total of $100 out of pocket for two new tires installed. I feel that this is fair, and I hope that this will bring a final end to this issue. My vehicle now has about 21,000 miles on it, and other than a hiccup every once in a great while, my C-MAX has been a reliable vehicle with a Lifetime of 48+ MPG.
One more thing to add: After having the first bit of work done, I drove from Miami to the mountains in the western part of North Carolina and back, about 2,000 miles round trip from Miami Beach. (I did four days of hiking in Pisgah.) As far as the road report goes, we were with A/C set to 74-76F, and we spent a lot of driving right around the 70MPH mark, but never above. As I had just changed from 0W20 oil to the regular Ford semi-synthetic (20,000 mile service) while they did the work on the tire, I think that the regular oil definitely dropped my MPG. I am way behind on my paperwork still, and I have yet to input into Fuelly the information from the four tanks that the C-MAX consumed on the trip, but I would estimate that I probably only got between 40 and maybe 43 miles per gallon, overall. On previous similar trips, I probably got more like 43 to 45. Could just be anecdotal, but that is my impression.
Concerning the tire noise, it was not too bad on the trip, but it was certainly there for all of the 2,000 miles that I drove--although my passenger (who loved my C-MAX) never commented on the issue. I had hoped that the drive would level things back out a bit, reducing the noise even more than all of the previous measures had done, but I don't think that it made a difference at all. I am going to schedule the new tire installation, and I hope not to have another thought about this again during the life of my car. I am going to get an alignment, rotation and balance frequently, even more frequently than I do now.
Time to get ready for my next trip! Thanks, Meagan!
Edited by ScubaDadMiami, 14 July 2015 - 05:44 PM.