When preparing to do an oil change on an Audi TT, gather all the necessary tools plus the oil and filter. The TT uses SAE 10-40 weight oil. There is a standard type filter on all models except for those with the V6 engine, which uses a cartridge type filter. The oil should be changed every 3,000 miles from a mechanics standpoint. However, the manufacturer suggests much higher mileage. Check your oil after 3,000 miles and you be the judge.
Start the engine. Let it run for about two minutes to warm up the oil for a more thorough oil change.
Raise the car with the floor jack. Place jack stands under the frame and lower the car onto them. Place the drain pan under the oil pan and remove the oil drain plug using the appropriate wrench. Allow the oil to drain for 15 minutes.
Check the oil pan drain-plug's metal gasket to make sure it is not cracked or broken. Replace it if it is deformed. If it is not deformed, save the gasket for the next oil change.
Install the oil drain-plug. Tighten it securely but with very little torque. There are only two threads in a thin oil pan and the threads can be stripped very easily.
Remove the oil filter using the oil filter wrench. Turn the filter counterclockwise to remove it. Drain it into the drain pan.
If the engine is a V6, the oil filter is a cartridge inside of housing. Use a wrench to turn the lower housing bolt counterclockwise to remove it. Hold in on the bolt so no oil drains as it is being removed. It is messy, so be prepared. Lower the housing quickly to the drain pan to prevent wearing the oil. Pull the cartridge out of the housing and install the new cartridge.
Rub a little oil on the oil filter gasket and install the filter hand tight only.
If there is a cartridge filter, it should be in the lower housing before installing it. Hold the housing with the new filter up against the upper housing and insert the lower bolt. Tighten the bolt securely with a wrench.
Raise the car enough to remove the jack stands and lower the car.
Fill the engine with the correct amount of oil in the valve cover oil cap opening. The correct amount of oil depends slightly on the year of the vehicle, so look in the owner's manual for the proper amount.
Pull the dipstick and check to make sure the oil level is between the two lower marks on the stick. Dispose of the oil properly and responsibly. Most all auto parts stores have an oil tank for used oil.