im not trying to sound like a jerk but is it really true that adding a cai and dual exhaust only add 2 mpg at best?

 

Yes, if that.

 

wow i figured it would be around 4-5

 

I don't know of any mods that you can gain 5mpg with, but deffinaly not with a cai and exaust.

 

i was hoping to get enough out of those and the ignition upgade that when i went to the gt 8.8 rear and hopefully 3.73's it would be back to normal.

 

Best fuel control is the right foot, if you had a 5 speed you can mess around some with shift points and coasting to save some more, but that isn't really practical with an auto.

 

Mustang v6's simply suck for fuel economy, you'll just have to get used to it. My 98v6auto is only rated 2mpg better than a 2010 GT500, with nearly 4x the hp

 

Ummm...........98 V6s were rated at 28mph, and I got all that and some with my old 98, I can gurantee you that the new GT-500 doesn't get 26, hell, it probably struggles to hit 24 on a good day.

 

Highway? Who drives highway??

http://www.fueleconomy.gov/Feg/noframes/14083.shtml
17/26mpg
150hp/215tq

http://jalopnik.com/5192600/2010-for...y-nobody-cares
16/22mpg
540hp/510tq

 

my car when i bought it still had the original sales sticker in the glove box. it said 29 on the highway i dont remember what it had for city. mine seems to get about the same as the 2001 4cyl cavalier i had before it.