dear guys I have a t-jet which I have driven about 34K, average around 2500/pm, and all are enthusiastic driving. My two bit observation is, if you keep it below 2000 rpm on steady highway drive you will get appx 15-16 easily. I drove from Bikaner to Jaisalmer, you cannot have a more empty road in your life, and got appx 13 for 120-130 speeds which are like 3000 rpm. I have done all combinations of city/highway/hill and assure you, if you want mileage keep under 2500 most of the time, or drive like the way I do... but I still manage around 11.5 overall!!