Although diesel engines function differently from gasoline engines, they do require some of the same maintenance, such as changing the oil. The Volkswagen TDI is the same way, and should be done typically anywhere from every 3,000 to 5,000 miles. In this case, the project vehicle is a 2004 Jetta Volkswagen with the 1.9l TDI engine, but the process is similar for other vehicles as well.
Raise up the front of the vehicle using the jack and set it on the jack stands. Make sure that the vehicle is solidly on the stands before crawling underneath it.
Set the drain pan underneath the oil pan on the middle of the car. Unbolt the drain plug from the bottom of the pan using the 3/8-inch ratchet and socket, and allow the oil to drain out of the engine into the drain pan. Once it's completely drained, reinstall the drain plug using the ratchet.
Slide the drain pan underneath the oil filter, then use the oil filter wrench to remove the oil filter. Pour out the oil filter into the drain pan and allow any excess oil to drain into the pan.
Pour some of the 5w40 oil into the replacement oil filter until it's full, then dip a finger into the oil and run it around the rubber ring on the end of the filter. This will help to create a good seal. Thread it onto the oil filter housing.
Lower the vehicle off of the jack stands using the jack and then pop the hood. Remove the oil cap on the top of the engine and pour in the oil. Total oil in the engine should be 4 and 4/5 of a quart of oil. Start the vehicle and allow it to run for five minutes to allow the oil to circulate.
