[AeroModder]

Thanks for the info, but I don't have a GPS to go by, and can't afford one, especially after ordering the new tires. ^^;

But from reading that, it looks like the percentages for the speedo and odometer are the same.

So, if I'm not mistaken, the formula would be:

Distance reading x % correction = Distance error
Distance error + Distance reading = True distance

And in my case it would be about:

250x0.02=5
5+250=255

Is that right?