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      01-05-2013, 01:06 PM   #26
335DEE
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Drives: 335d
Join Date: Feb 2009
Location: England

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These are big figures 60 mpg @ 80 -90 mph .. you were being towed right ?

If the answer is no then i'd be checking the Fuel consumption correction factor ..because if you are getting 60mpg @ 80-90 mph your correction factor is certainly not 1:1 more like 0.6