Date: Sat, 01 May 2004 02:31:55 +0100
From: Charles Christacopoulos <>
Subject: Re: Fuel consumption figures computer wrong

Colin Stamp wrote: > On Fri, 30 Apr 2004 22:12:46 +0100, David Taylor > <> wrote: > > >>>No, it is not. My Saab's computer gives mpg figures that are less than 1% >>>offset. >> >>then you're lucky or manage to drive identically every single time! >> >>I haven't reset mine in a couple of thousand miles and it says 31.2mpg. >>Of course that's averaged over that 2000 or so miles so if I now go and >>drive hard for half a tankful, i'd expect a much higher error than 1.5 >>litres per 100km. >> >>Similarly, resetting it for every journey (unless they are significant >>in distance )isn't accurate because you're filling a small amount for a >>small mileage and filling from a pump whose accuracy is unknown to you >>and could introduce errors and you can't be guaranteed of the click off >>point of the pump either. >> >>Like I said, either you're lucky or drive identically, either way, the >>display is a calculation which is averaged and therefore can't be taken >>as absolute. >> >>David. > > > 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. > > Colin. Yup. 10% too good a reading here :-) (9000, 1997) I think they are a complete gimick, Regards Charles -- Please remove _removeme_ to reply.

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