I bought a Groupon for an oil change at Big O Tires. It didn't go well.
Here's my experience:
After I came to pick up my car, I checked the level as I always do after an oil change, and the oil was clearly not fresh oil. Where as normally I can hardly see where the level on the dipstick is, this was quite clear. Clearly old oil. I went be into the store, told the manager, who swore they changed it, that indeed, he had personally watched it. I insisted it was not changed, so one of the crew wiped the oil from the dipstick on his arm, as if that was some sort of proof. It looked dark. soso they took it back to the rack, swearing they had changed it. They removed the oil filter as I watched, and the filter and oil was obviously dirty, but they keep trying to say that was because of traces of the old oil. It was obviously not a new filter. The oil was black. He replaced the filter, and lowered the car, not even bothering to top off the the lost oil. I said "Well, the oil is still dirty", so they lifted it back up, and drained the oil into a pan. Clearly not fresh oil, obviously quite black, but they still insisted it was. They changed the oil, still making the pretense that it was only dark because of traces of the old oil. Then the manager came out to tell me that I couldn't be in the bay. Too late, I'd already seen through their BS. Oh, they gave me a card for a free oil change! Like I'd go there again...If you have had a recent oil change there, I'd examine your oil carefully.