I have a 05 saturn sedan with a race pipe on it. on 05/10/01 I traveled with a fuel thank over 720km. I think his good because me car his close to be stock. Soon I will put coil that lower it 2'' ,change the flywheel and maybe add magnesium wheel. These change will change the fuel effiecent that it will over 800k .
tell me how u did with your ion and your way to save gas