Hi, I've had my Kia rio 6-speed manual since late December. I notice when I bring it up to 110 kmph I start to get an engine vibration. Seems to be when I hit 2900-3000 rpms. If I take it up to 118-120 it smooths out a bit. The car has only 900km's on it. I find that it seems to be reving pretty high for a car that has 6 gears. at 110 it is around 2800rpm. Has anybody else had this issue?