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  1. 2010-2013 Mazda 3 Engine and Performance
    We have a 2012 Mazda 3 hatchback which we bought new. We have 30000 miles on it and maintained religiously. During the first year it wasn't uncommon to see 38-40 mpg for average display and it got that by calculation when filling up. During the past few months the mph has dropped radically to...