I have a 1996 toyota camry, 4 cylinder with 87,000 miles. There seems to be a oil leak and it is burning off the exhaust and causing the car to smoke. When I check the oil level, it doesn't go down any from the leak. My mechanic even put a dye in the oil to try to find where the oil is coming from, but still cant find it. The car runs great otherwise, but we are puzzled as to where the leak may be. Does anyone has any suggestions?