Castrol Edge 5w20 - 4,000mi - 2014 Mazda 3 - 2.0L

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I looked at one of these cars the other day. Love my current Mazda,but it's getting old in the tooth.

Is the tune kit something you can install yourself, or do you need a tuner shop?
 
Definitely a DIY installation. You plug an adapter into the OBD 2 port and upload a file from your computer. Done in a few mins.
 
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