CBZ extreme

My CBZ extreme gives about 38-42 KMPL after second service and 3500 KMs. Some guys here ‘claim’ that their CBX give 55KMPL. Oh! what a buge variation!! Is this bike inconsistent in its mileage delivery?
I request all Hero Hond CBZ owners to post their mileage and KM’s covered so that we can get a good idea of the bikes actual mileage.
Thanks in advance for the help.
Regards,
Ashok