Guys,
I have an A4 2005.5 with 2.0T engine. It has roughly 24,000 miles on it. I change the engine oil every 5,000 miles even though dealer says that it should be good for 10,000 miles. Yesterday as I was driving the car the min oil warning light came on!! This is the second time that it happens! Now I don't know whether the car is burning oil or it is something else? BTW, I haven't noticed any type of leakage so I think it is an internal problem! I was wondering if any of you guys ran into this problem yet? I mostly drive it on highways!

if it is low, check for a leak. If it isn't low, you have a bad sensor

There is no leak and the oil level was low again at 4k miles after scheduled service! maybe going fast (above 120 mph) would result in buring oil but I don't see any signs of engine burning oil!!

If you are very low after 4k then there may be a problem, but if it is only about a quart then you should be fine.

Well I don't know how sensetive is the oil sensor but this was the second time it popped up at the screen! The dealer was saying that it is still within the expected range but I am kinda surpsrised to see it after 4k miles of oil change because accodring to the dealer you have to have oil change at 5K, 15K, 25K,... and I have been changing oil at 5K intervals in additional to regular scheduled maintainence!

Oil usage like this is NOT unusual. Heat and pressure from high-speed or high-RPM driving lead to increased oil usage in any engine.

You won't see blue or white smoke unless raw oil is pouring through the exhaust valve guides. Normal oil consumption doesn't typically leave a lot of telltales.

It's also normal for a car to use 1-2 quarts during it's first few thousand miles, but not as prevalent these days. Check your oil when you fil up for gas, just like the owner's manual recommends, and keep a spare quart of M1 (in a Ziploc freezer bag) somewhere in the car for top-offs.

I hope that if you're doing 120+ on a regular basis, that you're doing it on the track.

I just had this problem too w/ a trip to the Service Department only to say that there was nothing wrong. I am going to be more vigilant about checking my oil level w/ each gas fill up. Have not had similar problems with the 1.8T or S4 v6 twin turbo engine configurations...