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If our speedo's are reading that we are going faster than we are wouldn't our computers be thinking that we are going further than we are?
As an example let's take my speedo... when it said I was going 156 I was really only going 150.1mph. That's about a 4% difference.
Using this we figure that if I were to travel 30,000 actual miles and then sell my car (not going to happen but let's pretend) then that means I'll have about 31,200 miles on my odometer (assuming I was always going 150.1mph which I never do but that is the point at which I have my data).
Now of course this doesn't take into consideration tire wear... although I know BMW really can't develop something to calculate this, it would make the problem even worse. Think about it 4% of your warranty mileage could be chewed up but BMW being off on their calculations.
If you want to know why all our speedo's are off that may be a good answer.
The next logical place this brings us to is bigger tires... If you put 275's on the rear you'd be traveling 3.82% more than your car thinks you are. So if you had a used car with 245's and one with 275's (assuming same odometer reading) in theory you'd want the car with 245's because it will have traveled less actual miles right?
The real question is if the speedo and odometer are off by the same amount. If this is the case why could someone not argue successfully that at 52,000 miles on their odometer that their warranty is not over because they never actually traveled 50,000 miles?
Just my thought of the day,
Pat