I have A6 3.2 auto, and have suspicion that it is taking too long to reach operating temperature. Outside temperatures are in range of -5 to -15 C. I drive to work in urban environment about 15 - 20 minutes, and it barely reaches one bar on scale. If I drive longer, it will eventually get to half scale mark, where it should be. Car is also very sluggish for first five minutes, part due to slow shifting, and I assume due to low engine temp. I would like to know other people's experience with similar models. Thermostat is not that easy to replace, would rather not if this is normal. Also on last full tank it barely made 400kms (used 67 liters).

Thank you

 

I have 3.2 as well.
Around town I get around 500 KM per tank.
On a recent trip to the states I got 770 KM on one tank.
Have you had a tune up recently (plugs etc.)?