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Originally Posted by TDCRacing  HPTuner. I get around 28 in the city and around 31 on the highway with the mods in my sig.The highway mpg could be better but im running 3.29 gears wich brings my cruise rpms up a little in fourth when on the highway. |
Not saying you aren't getting improvements, but compared to the amount of money you paid for them, it'll be more than 5 years, if that early, before you'll get savings. Anyone making mods shouldn't be doing them to save gas. I didn't make any of my mods to save money - they were performance mods. If I get a MPG increase, it's a bonus.