Yes sir , it may be one of the factors, my friend also travels on the same route, while comming from isb to kamra he gets 19km/l and on the way back he gets 17 to 18 km/l wid AC ON , his car is Corolla GLi, 2010...he keeps needle on 90 km/h. By the way i checked again with 4 ppl on board, route was almost same but this tym travelled 83.3 or 83.5 km ( i forgot exact) n filled the tank again upto the brim...consumed only 3.30 liter petrol...Average this tym came out as 25.3 km/l...Absolutely amazing and unbelievable for me.... MashaAllah
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