Less than a mile after a cold start I hear a whining noise coming from front passenger side. The noise only lasts 30 seconds or so. At first I thought it was a stuck calipher or bad tire. However, I slipped car into neutral while hearing the noise and it continued and applying the brakes had no effect. Didn't notice any loss of power or other symptoms. I changed the oil the day before this started. Did I do something wrong or is this a coincidence. My husband thinks the Turbo could be going. I've made an appointment with the dealer and am terrified of mentioning the word "Turbo" to them. Car has 89K miles.