First off, my cars an 01 Camaro. I'm gonna calibrate the speedometer on a friends 01 WS-6, would this cost 2 credits? From what I've understood, it will. But I mean, will I really need to use anymore credits on my car since I already have a liscence on the vin. I just don't want to do this, and be out credits I'm gonna need for my car for whatever reason.