So I went up to Big Bear Mountain again over the weekend and it was snowing pretty hard. Once again, the X w/ Dunlop summer perforamce tires handled beautifully (no chains). I had the car in AWD mode half the time and 4x4 mode the other half. Didn't notice any handling difference. My question is this:

Is it better to leave the car in AWD mode or 4x4 mode in the following conditions.

- Snow w/ no chains.
- Snow w/ chains.
- Heavy rain.

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