how many miles should I do before an oil change
Depends on the type of oil you are using, so usually its around 5000 miles.
I still will do mine at 3000 to 3500, but thats a matter of preference.
With full synthetic - 5,000 miles. With regular grade oil - 3,000.
Looking for a Used Auris in your area?
CarGurus has thousands of nationwide listings and the tools to find you a great deal.