2007 Mazda 3 Engine Compatibility

ManicCasanova

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Mazda Protege 5
Well for some time now my 2007 Mazda 3 2.3L w/manual trans has been blowing some blue smoke every morning. Been topping it off and watching my oil to just buy time considering I've only had the car for 5 freaking months! I only put 9k miles on the damn thing. Anyways, I like the car and would rather deal with an engine swap rather than deal with car shopping again.

What brings me here is I see a few variants of the engine that goes to this car. Ones for MT or AT, turbo/nonturbo, Low/Standard Emissions. How important is it that these match my car specifically? Can I just get one from an Automatic Trans and throw it in my MT? THe price difference and availability between the options heavily favors the AT engines. Any advice or comments are appreciated.
 
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