I just bought a honda fit aria VTEC version. Last time, i full tank on petrol and run in colombo normal traffic until end of fuel. i maintain the RPM below 2. it does close to 8. (7.8) i wonder on this low fuel consuption. I heard lot on honda fit aria where it does 10-11 in traffic if it's a VTEC and 12-13 if it is iDSI. Already i changed the CVT oil and engine oil too. i checked the plugs and air filter too. all are fine. what could be the problem? is i need to do a engine tune up from a honda expert??