King of D'bags
Even more important than prepping your fuel is what's in your radiator. If you're running Redline WaterWetter or the like, remember that it doesn't significantly lower the freezing point of water. IIRC, WaterWetter is biodegradable. So just drain it in the driveway and refill with propylene glycol antifreeze and distilled or deionized water. Tap water can cause corrosion and scaling.