[v1p3r]

Originally Posted by chetanhanda

Anyways..theres something wrong with the fuel indicator.
Same with my car, it comes down quickly to the 1/2 way mark and goes down to empty pretty slowly in summer/winter ,maybe its not calibrated very accurately.

No, your car is the opposite. His car shows higher FE for the first half, which means the first half comes down very slowly.

Originally Posted by sreenivass

Well the question is more on why the indicator behaves this way. Higher revs and lesser FE is obvious, but the average FE is not a whole lot different. Why does it show as if there is higher FE for the first half tank, can it change with weather ?

There's a very simple reason for this. The float in a tank will be at maximum level whether the petrol is filled to the brim, whose level is the same as the top of the float, or slightly below, whose level is the same as the bottom of the float. So you may use 5 litres, and the float will still be at its highest point, and thus your fuel gauge will still show Full.