I recently (one week back) got an engine tune up done by a very famous person. He was able to solve most of the issues I had (earlier there was a noticeable difference in acceleration when I switch off the AC, now not there anymore) car is accelerating well and happy with performance. But today I went Galle and came back (Colombo) with full tank, I noticed that my car had consumed more fuel than before. (Quarter of a tank has vanished). I checked with the tune up guy and he told me that I must have accelerated more (high speed). Any comments guys? As an amateur I highly appreciate ur comments.