I am looking to buy a used jetta or golf TDI, someone told me that the pumpe duse cars are no good. I've been doing my research and it looks like the difference is the power and the oil that you must use. Is the engine really toast if you use the wrong oil? I also saw an add for a 2004 passat, I assume that this is the pumpe duse engine, it said that the oil was changed every 3000 miles, total mileage is about 45,000 miles. Is the engine bad? How can I check?