There's alot of negative experiences posted on this board, so I thought I would post something positive. I just got back from having my oil changed on my '06 'Vette at Mr Goodwrench. I made an appt to bring it in. I pulled the car into the service area, was immediately greeted, paperwork was ready, and they pulled the car right into the service bay and got on the job. I saw the tech go to the parts counter with the work order and pick up an AC Delco filter as well as a 6 quart box of M1 5w30. He put the remaining half quart in a parts bag for me to take home. Wiper fluid was topped off, tire pressure checked, windows cleaned. And they gave me the 'coupon price' even tho I didn't have one. Out the door in a half hour. OLM reset. I'm good to go for another six months, and will certainly go back to this dealership.