IMHO, AWD is not necessary. Unless it is demand AWD, you are in 4 wheel all the time and your mileage takes a hit. I much prefer selectable 4 wheel drive, where I can choose to use it or not. And in my years of towing, I have only had to use 4 wheel once to get up a dirt hill. Where I find 4 wheel useful is when we take the trailer off and go off-roading. Anyhow 2 wheel drive is completely adequate for general towing, and if you are in conditions where you need 4 wheel you probably shouldn't be towing until things improve...
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