I brought my car in for an oil change with a coupon. They recommended a fluid flush and a fuel filter, which I agreed to if they would beat a competitor price. He offered to match it, but when the bill came, they added so many bogus "shop fees" that I feel I got ripped off. And there are so many middle men, you never get to talk to the mechanic. You drop your car off, then a sales person takes care of your services/negotiations, then they give the quote to the front office person. I saw my car ready, but since I had to wait for the Sales guy to get off the phone, it took 20 minutes to check out.