Been having some fuel leaking issues on my 2011 and as expected, poor mileage. Got a chance to pull it apart today, and was glad I did. The float level was quite a bit off from what I would consider "normal." I adjusted it so the float is roughly parallel with the edge of the bowl, not as easy to see as the older carbs. Unfortunately I can only estimate mileage as I dont have a odometer, but I expect improved mileage.