Cold weather finds every weak spot in a car, starting with the battery. Run through this winter car prep checklist before the first freeze, then reuse it every fall.
Before the first hard freeze — usually October or November, depending on where you live. The battery test matters most, because cold weather is when weak batteries fail.
Why keep the gas tank half full in winter?
It reduces condensation in the tank and leaves fuel to run the heater if you’re stuck in traffic or snow. It’s an easy habit, which is why it’s on the list.