If we're going down this road, don't trust Goodyear, Sears, Firestone, Big O, K Mart, Sam's Club, Costco, etc., hell don't trust most independent mechanics either. I have two independent Audi shops I deal with for my wife's Audi, three years ago, took the car in for an oil leak. The shop quoted me $3,900 to replace the upper oil pan gasket and do the timing belt service service. Took the car to the other shop, who looked at the quote given by the first shop and said they would do it for $200 less. Dropped the car off on Monday morning, 8am. The tech. called me at 10 am to inform me that 1st shop was wrong on what was leaking, that instead it was the rear main seal on the engine, it would require removing the trans to do the work, and including the timing belt service, it would be $400 less.
I have a Discount Tire that I've dealt with for 10 yrs, since they opened. The original store manager is now a senior regional manager, he had been with Discount 15 yrs when he was given that store. He taught his people how to treat and service customers, and to do what was right. The three Asst. Managers of that store have all moved on and been promoted to Store Managers because they learned to treat people right. The people they left behind still practice what they were taught and treat people correctly. I've never had a problem with the service from them, infact they've gone above and beyond. What's interesting, is since that first manager was promoted and left in '05, they've gone thru 3 managers, service has remained top notch inspite of lousy managers, why, because the people do the right thing.