This is ...very disturbing seeing how I was get crap mileage already, now to find out that the speedo is fast.
I live in a little more country area so I don't get much driving in con-jested high speed areas, when i am there i usually am able to speed through, but I was near the city today on the highway and stuck in traffic when realized everyone was doing 80-90......
I stopped a little later plugged in my gps and watched it while i was driving and 55mph=60speedo, 90mph=100speedo.
drivetrain is all stock..
any common problems with this? parts that could go bad? if not, how to adjust?