I have a 2004 Chrysler PT Cruiser with about 48000 miles on it. I'm not sure if this car has ever been in an acccident. When I am driving the car and am sitting at a stop light, the car sputters for a few seconds and then it stops. Also, when I checked the oil the day before, I had an adiquite amount of oil and then the next day, I noticed oil leaking under the car so I checked the oil again and found no oil, so I put oil in and the next day, no oil again. When I put oil into the car and take out the dip stick, no oil is registering. Why is that?