Bajaj Platina 100 - Mileage: 72 km/l. The tag of the best mileage bike in India is currently held by the Bajaj Platina 100, with an excellent fuel efficiency of 72 kms for a litre of petrol. Bajaj Auto has also updated the Platina 100 with graphics, alloy wheels, LED DRL (Daytime Running Light) and electric start.