Mazda previews new gasoline, diesel enginesBy Andrew Ganz Mazda took the wraps off of its new gasoline and diesel engines, as well as a new high-efficiency automatic transmission, ahead of the powertrains’ official debut next month at the Tokyo Motor Show. The SKY-G direct injection gasoline engine (first two photos) promises improved torque and fuel economy – up about 15 percent from Mazda’s current 2.0-liter MZR powertrain – thanks to the advances. Mazda hasn’t said when the SKY-G e
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