My Mystique has the 15" tires from the factory and only gets around 20-22 in city driving. I have gotten 25-29 on the highway, but that is if I set cruise control at 55-60 and keep it there.
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'98.5 Mystique GS ATX/re-contented door lights/K&N Filter/Energy Suspension Sway Bar Bushings/Mintex Street Pads/high-beam bulbs in low-beams/Pioneer DEH-P3100 receiver/Pioneer TS-A6855's in all doors/removed ding gaurds
