Date: Sun, 2 May 2004 08:00:03 +0100
From: David Taylor <>
Subject: Re: Fuel consumption figures computer wrong

> Looking for changes in fuel consumption may be useful. A new air > filter in my Saab improved consumption by a couple of mpg. Also > useful for comparing what you get from keeping a constant speed 2 mpg over what distance? This is the precise point that's being made. Can you say that you didn't be just a little lighter on the loud pedal for part or all of the journey? The answer has to be no because unless the test is over precisely controlled conditions, you can't make such claims other than implied. I used to do a journey where I could do anything from 26 mpg to 34.2 mpg and all I did was drive more sedately. Where would those figures be if I'd changed the spark plugs and driven somewhere in the middle of both driving styles? Then add in the other error factors and we're back to square one. David.

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