I have ridden my beast more than 500km also with pilion rider for example from Delhi to Shimla, Delhi To Jaipur, Jodhpur Via Agra, Also Udaipur Ajmer, Delhi To Dehradun, Haridwar Even my highest ...

That depends on your riding style. Most people say MT gives better mileage because its cruising speed is 90-110 and r15 v3 cruising speed is 100 -130 . R15 v3 is designed for top end performance ...