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.

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1999 Silver GTP~HP Tuners~XP cam~ZZP FS Intercooler~#4 FMHE~ZZP 78mm Billet Throttlebody~LQ4 MAF~Lucas 42.5's~ZZP SS Headers~2.8 MPS~PRJ fuel logs~Ported & Polished S/C~TDCRacing FWI ~Built Tranny-3.29's-7/8's chain-Intense forged Input Shaft~
12.71 @ 107 / 1.9 60' / .401 r/t/ Lot's of excuses

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