My car is doing something a bit odd in this cold weather. I park it on a hill (facing downhill) and lately when I start it it's reading about 25 on the oil pressure gauge until I roll down the hill and turn onto a flat street. Once i get around the corner and let it idle on level ground it's back up to 60+ after a second or two. I don't recall it doing this before the recent cold spell. Oil level is fine. How much damage is this going to do to the car if I have to let it warm up for a minute before I can head to level ground? I could park it on the other side of the street facing uphill bu I like having it in front of my house.