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Originally Posted by asdf1234
WP fiesta doesn't actually have a fuel consumption thing so I do it by recording odom manually as well as how much I fill up. Maybe I'm filling up much less than I think I am....
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My XR4 uses 8.5L and my average speed according to the on board computer is 37km/h .. I only use the car to get to work in the City and back, something either very wrong with your WP or your calculations must be out a bit.