I'm looking at buying a new set of tires that is known to be 10-15% less efficient than the OEMs. Does anyone know if the Tesla navigation system eventually considers the decrease in efficiency when scheduling charging stops? Does the car uses my own historical consumption when performing the calculations? Recently I planned a 600 mile trip to Montreal and the car initially scheduled 3 stops with a typical 15% remaining charge at each stop before getting to my destination with a remaining charge of 12%. I'm worried that with the less efficient tires the car will overestimate the remaining charges. I understand that the car may simply divert me to another charger or ask me to slowdown but I'm interested to hear from Tesla owners about their experience on long trips with less efficient tires. Was your car reasonably accurate with its estimates?