Hero splendor I smart is good in milage other than bikes are avaiable in market .when broght hero splendor I dont think about filling petrol in bike .hero splendor average is about 90 plus this bike is very comparble all other than is very good when I ride this bike feel very nice its very powerful bike .this bike price is very low other than bikes are avaiable in market when travel long tour with this bike dont waste your money on fuel get rid with hero splendor I smart . Its approx about 100cc.engine of this bike is very power ful