I just bought this car. As is. With 82k on it. After driving it 500 miles I checked the oil. It was dirty needed a quart and an oil change. I took it to jiffy lube got an new air filter oil filter and they put in 4.6 quarts of 5W30 oil in. 2 weeks later. The oil light flickered. And I really didn't think anything of it. No smoke. No visible leak. Nothing. Then I drove about 1/2 a mile and the whole top engine was shaking. I parked it shut it off and checked the oil. Almost nothing on the stick and what was there looked dirty. It took 4 quarts and then ran fine. But obviously theres a problem. Anyone?