Auto parts suppliers...opinions.

[Amnesia]

Totally agree. I've heard the same about electronics such as TV's, etc from "Big Box" stores VS the smaller specialty stores... Dunno?

[Riff Raff]

If I buy local in my hometown, it's nothing but NAPA "Echlin" (high end) product line. If I buy on-line internet, it's nothing but Summit Racing. Your mechanic is right; Advance Auto is only good for items like WD-40 and maybe some hand-soap or a key-chain, period.