At the mechanic at 8 am when the opened for an oil change. Home by 9 am. Seems like such a waste. Supposed to change the oil every 6 months or 6,000 miles. It has been 6 months, but only 900 miles.
I only go by mileage. I take my car in like once a year since I hardly drive. It's 14 years old and hasn't given me any problems yet.