I was following a friend down the ramp to the interstate when he left me behind I went to catch up I look at my speed and it said 85 but it did'nt feel like it he slowed down for me to catch him he was doing 65 my speed said 75 what can I do to fix this?

 

Im very confused. I guess I dont see your problem. You were going 85... then he slowed down for you to catch up and you slowed to 75....
doesnt sound like you have a problem. could you clarify this better.

 

he was going 75 I had to speed up to 85 to do 75 hope this helps

 

gotcha, I guess if your speedo is off you will need to take it to a mitsu dealer to get it calibrated for the correct speed.

 

what tires/rim size do you have? have you changed your gauges at all? if no to all of these, i would bring it to dealership if you have warranty.

 

Use periods. Kidding but if your speedometer is off a couple shops in your area can re-calculate the speedometer if you got rims/tires or if its just off. Call around.