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  1. Blockade the grill during the winter?

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    Hi there everyone, I just recently purchased a Mazda3 S this winter, and I've been noticing the very temperature dependent fuel economy. I've also noticed that using the heater immediately after the cold engine light has gone off results in lukewarm to cool air coming out of the vents (A/C...
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