thankx everybody...
i wud like to add some more here that before hitting the road we filled our tanks from the shell petrol pump in f-7, 40% high octain & 60% regular, and at the end of the tour we calculated the fuel average of our bikes, we travelled almost 650kms and the fuel average of our bikes is:
suzuki: 25kms/ltr
kawasaki: 20kms/ltr