Mazda3S6

Hello all, I just joined. I've had a 1G DSM for the past 7 years and finally parted with it today and now I have a 2010 Mazda 3 S Sport (6 Speed).

I did a quick search but didn't find anything for the newer car...are there any "free" mods to do to increase mpg or a little response? I'm used to my DSM and we have a lot of free mods, so let me know!

Thanks!