http://news.bbc.co.uk/1/hi/uk/6990446.stm [:@][:@][:@]
The upshot of the piece is that the car tested produced 30% more CO2 cruising at 80mph instead of 70mph.
That's fine for that specific car, under those specific conditions ... but not for all cars.
E.g. my PD with 6-speed box is...
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