Interesting...
In my mind, if the tire is rotating 1.8% faster, and at speedo 60, true speed is 58, wouldn't that mean that the ODO mileage is off by a bit... should be less than 411... which would mean that the MPG should be lower instead of higher. ??

I'm in no way a mathematician... actually, I suck at math. So, please help me understand this. Thanks!