The 450 km trip I make from Kolkata to Asansol and back along NH2, normally returns 11 ish FE with 100% AC. That's with long stretches at speeds > 120kmph ; touching 140-150 when I can ; shifts at 3-4K rpm.
Last month I did the same route with my parents in the height of summer. 100% AC, sedate driving 80-100ish. Never crossed 110kmph. Car returned 14.7 kmpl !!!
In absolute conservative driving in city traffic not crossing 60 kmph / 1500 rpm and gear shifts at 1200 - 1400 rpm I managed to squeeze out 14 kmpl from my Palio 1.6 without AC usage except for the minimal defogging of the windscreen. I drive about 22 kms one way to work everyday. This check was done from a tankfull to tankfull without autocut on the petrol bunk.
If you manage to use the torque produced by the engine well you can squeeze out good FE out of any car.
In normal driving conditions without revving the engine much I manage 11 - 12kmpl with AC in City. On absolute full blast driving I got 11 kmpl on the expressway with 60% city driving (in Bombay).
This included redlining the car very very often! Good FE I must say.
The best I ever got was about 17 kmpl (or was it 18 kmpl?) on the highway.
Last edited by moralfibre : 29th June 2007 at 15:29.
maruti swift vxi (2005 Nov model done 5000 km) - 12 to 13 kmpl (city - coimbatore), 15 to 16 kmpl (highway)
fiat siena 1.6 elx (2003 Aug model done 28000 km) - 8 to 9 kmpl (city - bangalore), 11 to 12 kmpl (highway)
hyundai santro dx (2000 Jan model done 52000 km) - 11 to 12 kmpl (city - coimbatore)
I do rev the engine hard sometime and cruise most of the times.
After autostop, if you shake the car, it will easily take in another 3-4 litres and the petrol can be seen till the brim. I do it this way and its the best way to judge the FE, IMO.
The best method to measure FE is to tank up (autostop or otherwise), drive around till you hit reserve and fill it up again. This time though note how much petrol your are putting in in liters. Repeat this three to four times and get the average.
Even better method is to fill the tank and reset the trip computer and drive for 1000 KM and right while noting how much petrol your are putting in. When you hit 1000 KM, fill it up again and do the math.
Below is my log for the last year. Most of the time I have done full tank to full tank..Once or twice I have filled 10 ltr or so. That is added to previous full tank filling to make calculation correct. Whenever I have got closer to 15 or above, significant driving was on out of city. I switch off the AC when it is cool enough and switch it on when it gets hot.
I don't rev the car too hard but when I have the road available, I tend keep 70-80 Km/Hr.
So far my car(Cedia) has done around 2500km so its a bit too early to comment but I'm roughly getting 11 in bangalore city traffic. Yesterday I did a trip to mysore and I drove the car really hard at 120+ and 140 at places. Surprisingly, it only used half the tank of fuel and gave an amazing 15.6 FE.