I've got a high milage Mercury Grand Marquis. Recently changed the oil in it using Mobil 1 synthetic. It now smokes worse and leaks worse than before. I thought it might do that but was willing to take a chance. The oil has been in the car for 4 days now with no more than 120 miles on it. Would it be ok to drain the oil and reuse it in my other car? The other car is mechanically sound with no leaks to cause smoking or extrernal leaking. Obviously I'll use a new filter but will the oil bo ok to use. I hate to throw it away considering the cost.