The problem at WW/Sam's/Costco/etc. ends up being that the auto service shops are basically in the business of selling THEIR stuff, & the profit contribution is less than from selling TV's/blenders/Pot/Pan sets/etc. They want to compete on price, so they get a lot of "seconds" in their mass ordering. They also figure that since folks are using them for price as opposed to quality, anyone that can run an impact is "good enough". I worked at a Sears auto center for about six months as a kid in the 70's, & couldn't believe how bad some of their long-time wrench monkeys were. Couple that with the fact that there was constant pressure to put a new Diehard battery or Sears branded tires in everything that came in & it was a recipe for really shoddy work. I remember one time a service writer telling me to get in my car & take the 5 quarts of oil (sitting on Bob's bench) to a parking lot about a mile away. Turns out Bob, the "mechanic" (not some new kid, but a guy in his 30's who'd been there about 7 years) had done an oil change but forgot to put oil in after he drained the pan & changed the filter, & he discovered it during the test drive when the oil gauge was showing no pressure & the engine started lugging. At least he shut it down instead of trying to get back to the shop. They were more interested in covering it up than doing right by the customer. I did a lot of alignments, brakes, tune-ups, waterpumps, A/C & general repair work, & at my six month review they told me that while my work quality wasn't an issue, I wasn't selling enough Sears branded stuff & spent too much time adjusting Carbs, turning Rotors & Drums & hand packing bearings instead of selling new "like everyone else". I went to lunch, applied for & got a job at an independent shop down the street, went back & gave notice & moved my toolbox out that night.