Guys, I just did a 700 Km odd round trip and I got a mileage of somewhere around 19-19.5 using the tankful to tankful method. Only IOC pumps were used. My wife, 2 young kids and a couple of heavy suitcases. While coming back we had a couple of rice bags as well. I was using 100 % Ac or 2 or 3 blower speed setting depending on the temperature outside....The max. speed I touched was between 145-150 kmph.I was doing speeds of 100 -120 kmph consistently. I even went through rumble strips at 60-85 kmph and no rattles yet . I just finished my 5k services.