I get about 7 hours ish, but I wish I could get 8 hours. It's amazing how much an hour can do but I feel amazing on 8 hours in the morning but sometimes feel like a zombie on 7 hours.
According to your logic, a 2wd w/ snow tires will be a 4wd w/ snow tires AND even with a locking rear diff. Have you ever been off roading or gone up a icy slope in the winter?
You live in canada, so buy something with both 4wd / 2wd. Having 2wd for the summer will save you gas money, and having 4wd means its safer to drive in snow (regarding safety from your vehicle and not others).
Make sure to check the oil dip stick and transmission dip stick too. And if the car is already when you get there turn it off first thing and just look through car.
HardCockSoftRock
Reference to the the hard rock casino