2006 Toyota RAV4 engine oil

I recently was scheduled for an oil change, and appr. 1.5 weeks before, I checked the oil and it was down by 1 quart. I raised my concern about amount of oil usage in a 10,000km span between oil changes (I went over the recommended span by 2000km), and the service manager told me this was totally normal consumption, and every car will use approx. This much. My concern is that I have only 6 months left on my warranty, and this may lead to big $ later on. Could you let me know if this oil usage is normal, and what I may confront my Toyota dealership with.

Thanks so much

Jill