With eco mode in city its 14 to 15. In highway it is 12 kmpl if you are driving at 110 to 120 and 14 kmpl if driving at 100. Driven T8 variant for 50 k now
For this, we'd suggest you please visit the nearest authorized service centre of Mahindra as they would be able to assist you. Follow the link and select your city accordingly for service centers.