Not that I disagree with you at all. The problem is that even in snowy western NY where I live the main roads and highways are clear most of the time. So if you look at it from a "snow tire season" perspective the snow propably has little effect for most poeple. What with all the plowing and salting, I drive on clear roads probably something like 18 to 19 out of 20 days throughout the winter season. It's the tire and the temp affecting mileage. Someone living and driving off the beaten path may find things a little, or even a lot, different.Insightful Trekker said:IMO the cold + traction losses (Yes, a snow tires' job is to minimize this factor) + drag due to "plowing" the snow will be the bigger factors vs. tire rolling resistance.