Do NOT use the service department at Planet Toyota in Matteson, IL. They are scum. I took my 2010 Toyota Prius here at 20000 miles to get my oil changed and instead of $60 synthetic oil, they put $20 conventional oil in my car. According to the service department at another, credible Toyota dealership, this can cause motor damage to my Prius. The customer service is anything but... they would not resolve my issue because I've since moved to another state. I have filed a complaint with Toyota's corporate office and the BBB. Not only did Planet Toyota fill my car with the WRONG oil, they tried to convince me to wait until my next oil change and told me it would be fine.
Bottom line: DO NOT DO BUSINESS WITH THIS SERVICE DEPARTMENT. They do not have your best interest, nor the best interest of your vehicle, in mind. And, after reading several negative reviews online about that dealership in general, DO NOT BUY YOUR VEHICLE FROM PLANET TOYOTA. Their staff is comprised of scum. Go to another dealership if you want peace of mind.