My truck has seen temps in the teens only a couple of times. Around here, 30 degrees is BITTER cold! Gelling isn't something I worry about. However, I would think the oil would get thicker in the cold. I don't think it would help prevent gelling. If I know I will be seeing cold weather, I cut back on the quantity of oil I run in the fuel and add a good additive to be safe.
Steve Keim