I was wondering how many of you use Mobil1 0w-20 for the winter ? I just purchased 5 individual qts. of it at a local Wal-mart. I had been gonna buy 5w-30, but noticed a good price on the single quarts. Any Mobil1 oil was only 3.74 a qt. Good deal in my opinion. I couldnt pass it up. I think Im going to use a Mobil1 oil filter just to try it out. I just wanted your opinions on the oil for winter use. I wont be driving my car much in the winter either. Just on the days when the road are clear. I'll be changing the oil at 18k miles. I have a bit over 17k now. I plan on sticking with Mobil1 for the rest of the time I own the car. Im thinking I should use 5w-30 when summer time hits.