Date: Sat, 01 May 2004 09:27:46 +0100
From: Colin Stamp <>
Subject: Re: Fuel consumption figures computer wrong

On Sat, 1 May 2004 07:56:41 +0100, David Taylor <> wrote: >> What's wrong with resetting the computer when you fill up and >> comparing the reading with the pump reading at the next fill-up? >> If the OP was doing that, then the discrepancy of over 10% is very >> dissapointing. > >Nothing wrong with doing that except that a) you don't know the accuracy >of the pump and b) can't guarantee that the fuel cut off works exactly >the same the next time so discrepancies in the filling aren't being >taken into account. > >I just can't get hung up on that amount of difference. :) Pumps should be reasonably reliable - I'm pretty sure they are legally regulated. It won't be perfect, but you'd have to be going some to get it wrong by over 6 litres in a tankful. Adding up all the uncertainties I'd expect well under 5%. For as much as 10%, I'd be starting to worry that something was wrong - maybe the fuel rail pressure is a bit high or something. Colin.

Return to Main Index

The content on this site may not be republished without permission. Copyright © 1988-2020 - The Saab Network -
For usage guidelines, see the Mission and Purpose Page.
[Contact | Site Map | on Facebook | on Twitter | Shop Amazon via TSN | Site Donations]