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Old 05 Oct 2006, 02:13 pm
Carguy
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Default Re: Fuel Consomption from OBD-II values


Chris wrote:
> Is there any way (formula) to calculate the fuel consumption?

I don't think it's possible, there are some programs that act like a
trim computer (showing instant MPG data, average fuel consumption,
etc.) but the actual fuel consumption will be different from what the
computer may show.
I just do this a simple way:
1. Note the reading of the fuel gauge when it's at easy to see exact
position (e.g exactly an 1/4 tank mark).
2. Reset the trip odometer to zero
3. Fill up the gas tank (it's easier if you fill up with even number of
gallons or liters, e.g 30 liters.
4. Drive and once the fuel gauge will show the position you noted when
you zeroed the odometer - check how many miles you drove.
So suppose you filled 30 liters and drove 250KM before the gauage shows
the same reading.
So you got 100x30/250=12L/100km

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