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Help figuring out mileage


wnaplay1647545503

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2007 dodge ram 1500. Filled up today and drive to Salem Ohio and back. Mapquest put me about 162 miles each way. When I got back the odometer said I had went nearly 600 miles. What would cause this? I have 20" factory rims but I don't know if they are factory for this year or truck, would having the wrong size cause this? I was out of gas the same place I filled up this morning. I don't know anything about this truck or if anything has been changed by the po.
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The Odometer reads from the same thing as the speedo - the ring gear. But, (without thinking too much about it), you're probably only off 5% or so if those are not the original tire OD.

 

Any chance the truck had much different sized tires before you had it, and the previous owner had it calibrated?

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