Cold temps? Cardboard on the ground and sunshine on the driveway is your friend....but I hear you. If I know an OC is coming up, I start watching the weather for the right day, usually around noon I grab that 30 minutes. LOLI have always done oil changes myself unless it's close to the freezing mark. Hard to explain, but my oil change set up is half in/ half out of the shop for ground clearance. And I don't particularly like laying on 35 degree concrete. Disposal is the easy part, got a dirt/gravel driveway? Just dump it out there, makes a nice smooth, hard packed road. I'm kidding about dumping it the driveway, please don't do that.