I've been looking on here for a while and didn't see what I was looking for so sorry if this is a repeated thread. I just got a 2010 SE and was going to install the Cobb intake, turbo back exhaust and get the access port. My question is given that what have you guys noticed happened to you average mpg city and highway.
Most of my driving will be highway at about 75mph and in the city I'll just drive conservative since there are way to many cops looking to ticket everything here. I know the car isn't made for great MPG but I would like an idea of how good or bad it will be headed. Oh and if it matters I run 93 octane.

 

MPG is relatively the same if not better by 1 or 2 MPG top

 

Mileage will mainly be determined by your right foot. My mileage has remained roughly the same all the way from showroom floor stock to my current modded level with aftermarket turbo and 425whp/400wtq.

 

I noticed a fairly significant increase in city mileage after the cobb. Before ap id get 180-200 mostly city some highway. After i get 220-240. Similar conditions, similar driving styles.

 

I've hit almost 26 mpg with a Cobb stage 2 setup (long straight highway). Factory tune seems to be spilling gas out the back.