Losing a lot of oil somewhere and there are no oil stains under my car? I put in about a quart 2-3 days ago and im a quart low again? I think I have some serious problem, engine has 120k on it. When i turn the car off after driving it, i pull the dipstick to check the oil and some steam/smoke comes out. I know there is a very small leak on my pan around my oil gauge sender or whatever, but not enough to leave a stain overnight.