It has been widely speculated that hp increases as miles increase. Well, here is the proof from Dodge. https://lh6.googleusercontent.com/-bQGGlQbyEBE/TkqbPnj52XI/AAAAAAAABVg/s3Hs8G6Cr-c/s640/VVT1.jpg
Very true, about the time I passed 3750 my car picked up about a tenth in the 1/8th. At first thought it might be better DA, but checking my timeslips DA was about the same.