I had a neighbor once who liked to pull the plug on his truck, while parked in the garage and let it drain overbite & refill the next morning. Unfortunately, his wife didn't know this ritual and took his truck to town one day. He got a call, " honey, the truck is acting funny " but the bill that came after was anything but funny. He now does his oil changes all in one shot. He figures the few extra drops just ain't worth it!