Yes, I always do the tankful to tankful method. Going forward, will post the MID displayed mileage to give the amount of variant from the acutal refill to MID mileage. The average speed again is a very tricky thing. Agreed lower average speed reduces the mileage. But higher average speeds to reduce the mileage. It again depends on the kind of traffic. Once you start driving more you will strike a balance to get the best FE.