In the commuter motorcycle segment in India, fuel efficiency is often the most important factor for buyers. Bajaj has been bold in claims about the mileage of the BYK 100 and has positioned it as one of the most fuel efficient bikes in its class. But as many riders have come to know, there can be a major difference between what figures are claimed and what the real world does. Fuel efficiency of a bike is a function of traffic conditions, riding style, maintenance, even climate. Early adopters have reported some impressive mileage figures, while others say the bike doesn’t match the advertised numbers. This has sparked debates about how accurate Bajaj’s claims are and whether you really do get better fuel efficiency from the BYK 100 than its competition on a daily basis. The methods of measuring fuel efficiency are also discussed along with if the standardized testing procedures are reflective of the riding conditions in India. The BYK 100's actual mileage performance could be a make or break factor for many potential buyers as fuel costs continue to rise.