This one is directed at those got there 7 in stock trim, drove it for a while, and then modified it. I'm thinking modding the intake, exhaust, and maybe a ECU. If you have a turbo and changed it out. Have you noticed better or worse gas mileage? Just curious.

 

The ECU (fuel management) is the best way to save gas, though, unless you're going to run a standalone, your O2 sensor will override any changes at cruise.

 

I think mine has gone down a little after moding. But it does take more fuel for more power to go faster.