I hear what you're saying. You can't expect these guys to know much about cars. If they did, they would be working somewhere else making more money. But you are completely wrong about the plumbing supply house. In fact, there is a master plumber and a journeyman that work at my supply house. Most guys at supply houses used to be plumbers. They decide to go work at a supply house because it's easier. They are either lazy, or just couldn't hack it as a plumber, and rather hang out in the ac at the supply house all day. I constantly have questions for the guy, Joe, who is the master plumber. He is about twice my age, and probably has 3x my experience. I am a professional, but there are always new things to be learned. I just thought it was funny when the guy asked me if an '87 Buick Grand National was an SUV. Bottom line, I think Pep Boys is much worse than Advance. I've actually had really good experiences at Advance. If you dealt more with Pep Boys you would know how I feel. Pep Boys should stop being so cheap. It would behoove them to pay some decent money to a little more knowledgeable counter guys. I know for a fact that more people would shop there if their workers weren't such idiots. I can think of 2 people off the top of my head, that don't even go to Pep Boys anymore because the people there are so clueless. Instead they go to the local Bob's auto parts, which is a little more of a drive. Anyway, I think that Advance, and maybe Autozone, are much better run than Pep Boys, and that's why they have been kicking Pep Boy's butt. I just go to Pep Boys because it's in my neighborhood.