One of the best bike from Bajaj for mileage is platina . I am using Platina 100 cc from last 3 years which is providing me 75+kmpl in city which is really awesome. Now it has become more powerful 110 cc which provides you max power 8.6 and max torque of 9.81 and you are getting tubeless tyres with it.if you are searching bike with mileage and daily use or commute I ts the best bike u can go for. even if you want to give deliveries of things and kind of of purposes u can take one since its soo reliable and get mileage in this high cost of petrol.