The warranty and gurantee of a vehicle is given on the complete vehicle except the wear and tear parts. The clutch plates comes under the wear and tear, so there won\'t be any warranty on the clutch plate. Moreover, for the confirmation, we\'d suggest you walk into the nearest authorized service centre as they will be the better person to assist you. You can click on the following link to see the details of the nearest service centre and selecting your city accordingly - Service centre
In order to improve the mileage, we would suggest you drive slower. Driving fast can reduce your fuel efficiency by up to 33% if you are traveling above 60 mph. It is best to change gears appropriately and match the gear and the RPM carefully.