Audi A3 oil change every 5K or 10K?

I have 10, 500 miles on my 07 A3. The oil low indicator came up and I
added a quart of oil (the indicator went away). Here is the confusion
I have: I called an Audi Dealer and asked if an oil change is needed
and they said Yes! one needed every 5000 miles becasue "it's a small
engine generating lots of horsepower". Called another dealer with the
same question and they said it's not unusual to have to add a quart
after 5000 miles and I should wait till the 15000 mile service for an
oil change since that is the "recommended" interval. So, is the dealer
#1 after my money or does the A3 engine really need an oil change?