DanJ

I suspect that it doesn't matter if the vehicle is 4wd/awd, if they aren't winter tires, they don't qualify. I suspect that many light truck/SUV 4wd tires do have m&s (mud and show) ratings on them, (the Continentals on my Escape have the small m+s on the sidewall) while your typical awd car or minivan doesn't.

I wouldn't go without snowtires after putting them on our Caravan a couple years ago. All season really aren't, unless you are talking about all 4 of Florida's seasons. When we traded the Caravan in last January, I got a strange look from the guy at Canadian Tire when I took the old van in and said "well, it hasn't snowed in 2 weeks, get those tires off of there". We drove the new van on the tires it came with, and even though they were new, you could really tell the difference.