Quote:
Originally Posted by tbobb
what do i need to do to compensate for that? do you mean if my gauge says i am going 50, that i am really going 48.8? and if my last tank gave me 225 miles it is really less!? or do you mean something else?
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Your last tank gave you 225 'indicated' miles, so actual mileage was ~230 miles. Speedo indicates 50 mph, actual is 51.2. That is assuming the speedo was accurate anyway... A GPS could tell you really quickly.