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      11-08-2012, 12:10 PM   #6
cypis007
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Drives: E91 318d Touring
Join Date: Nov 2011
Location: Capital

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Pressure also matters. Old tires could had drop, in time (few months), from 2.5 to 2.0 bar, progressively. New tires are pumped up to 2.5 and that gives your significant gain in mpg.