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Cool story and good point. I notice you have Mazdaspeed CAI and Hypertech tune. From your experience if you did a virtual identical runs - similar to the top gear story - with stock air box vs. CAI and everything else be the same in your car - would you say your car with the CAI would give...

Did you have other mods and an ECU programing to go with it? Your numbers look awesome but if you go to Fuelly http://www.fuelly.com/car/mazda/speed%203 most of our cars don't do nearly as good as you. What is your secret:)

I live near Boston area which means more than 7/12 months we get cold weather and I have noticed the impact on my mpg. I have been keeping track of per tank mpg and with 70/30 highway I get around 26 mpg during warmer months and around 23 mpg in colder months. I am thinking about getting a CAI...