Quote:
Originally Posted by lflaco
Great! I see that our vehicles with the proper maintenance and care will yield great MPG. But FYI the vehicles are set with the speedometer/odometer to that vehicle configuration, ie engine, transmition, diff, tire size, to get the most accurate mileage, meaning changing the size of the tire to a smaller one will spin faster telling the vehicle is going more miles than it ussually goes, so in the long run it will say an innacurate reading. Somewhere on the net, there's a tire/speed calculator that will tell you what is your actual speed, which in the long run will affect the odometer reading, just look into it.
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Well aware of tire diameter, the V speed rated 255-55-18s are the OE wheels that came on my truck and are the wheels I mentioned on the 580 miles per tank trip. My staggered setup is actually SLIGHTLY larger in diameter then the OE wheels resulting in several fewer revs per mile, this would actually show a lower OBC MPG then actual MPG if the OBC was calibrated perfectly. I GPS log and calculate MPG on long trips, this is more accurate then the OBC data.