All of my figures were taken on a tank that I had used purely running around town, many journeys only a mile or two following a cold start, my auto box does get to a higher gear except top at around 30 mph and rarely do I have to rev above 2000 rpm in town, as I say the only job I have left is the thermostat as mine only runs to 82/3 degrees, I did find an improvement by using good diesel.
The figures were taken on brim to brim and also the IPK OBD which did prove to be quite accurate.
If I trashed it around town I am sure the figure would be much lower.
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