Aviator6

I purchased a 2012 A6 Prestige, 3.0T, late last year. The 35K service had just been completed by the Audi dealership where I purchased the car. I am not comfortable with going 10K miles between oil changes, so at 42K, I did my own oil change. When I removed the drain plug, I noticed that there was no crush gasket installed. I assumed that the last person who performed an oil change(may not have been the Audi dealership as my understanding is that they pump the old oil out through the “dipstick” tube), simply omitted it. There was no sign of any oil leakage at this time. I had a good supply of 14mm crush gaskets, so installed one when I replaced the drain plug. After refilling and starting the engine, I checked for leaks, but did not let the engine get to normal operating temperature. Well, several weeks later, I notice oil on the garage floor. It took that long for the leak to become evident, as the under-belly pan is of a material that will absorb some oil. I assume the fibrous material is for sound insulation?
Did some searching of the forum, questioned an Audi tech, but could not get a definite answer if this engine uses a crush gasket on the drain plug. Decided that since it wasn’t leaking without the crush gasket, I would remove the gasket and see what happens. Removed the crush gasket, cleaned up the spilled oil and voila!, no leaks. I cut the under-belly pan and installed a hinged, access door so I could monitor for leaks without having to remove the pan. A couple hundred miles later and no leaks.
So, does anyone have a definitive answer, and please no guesses, does this engine use a crush gasket on the oil drain plug.

BillBoost37

Please see your other thread on the same topic.