New lawsuit against Cummins/FCA

Mileage probably didn't drop at all because the new tires have more tread left with means a larger diameter tire which results in fewer revolutions per mile driven being shown on the odometer for the distance driven divided by the fuel used which then will show less mile per gallon numbers. Still traveled the same distance with the worn tires which had turned more times per mile due to the now smaller worn tire diameter to the road. Easily can make a 3%+ difference in hand calculated MPG's just like going to a larger diameter tire sixe does in altering perceived MPG's or actual speed driven.