We we added snow tires we did a near 200 mile round trip through the Adirondack mountains, in 50-55 degree temps. There were lots of challenging hills and valleys, frequent shifts to SPORT/Manual mode, back to auto mode, and when we returned home our trip mileage was 50.5mpg, pretty good for snow tires! We've seen as high as 57.8mpg in summer trips, flatlands, with the factory installed Michelin tires...........HOWEVER, was has KILLED our MPG's? COLD weather and SHORT drives!!! We've dipped as low as 23MPG. The more the car runs and warms up, the higher the MPG's start to climb back. It's been in the teens and 20's here, and in the next few days we'll be dipping to -7 below zero at night to a warm, balmy 8 degrees during the day. ALL cars, gas, hybrid, or electric will suffer in COLD weather. There's just no way around it............ except moving to a warmer year round climate.

tempting......................