Join Date: Jan 2007
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I'm beginning to think it's tied in to the average speed calculation.
Technical data will specify a return of 48mpg based on a steady 56mph for example, so I'm guessing it translates the average speed into consumption from a reference table, and nothing more - this would explain it's innacuracy but it would also give a truer average consumption as well as it's not just about the distance you've covered, it's about how quickly you've covered it - I don't think it can gauge fuel consumption this accurately which is why the figures don't tally.
Tomorrow I will have a new theory, and eventually we will stumble across the answer. Sadly we'll probably be completely unaware of the fact, or at the point of not particularly giving a monkeys cuss any longer, either way, it's fun to speculate.
1 rep point to anyone who's theory involves naked women and natural yoghurt.
Currently in Schmooster's garage:
2003 Laguna II 1.9dCi Extreme