That's a very good question- doggone if I know the correct answer.
When I followed Terry's advice & replaced the (original, factory
)PCV valve on the Neon last spring, I tried our local family owned auto parts store first. Sure enough, they had one sealed in a Fram bubble-pack, the lower end of the orange cardboard faded to gray in places by who-knows-how-many years of late afternoon summer sun!
But price was OK, it was right there in front of me, so I bought & installed it.
Funny thing- that "Fram" PCV valve was externally a combination of plastic & steel, and stamped into the steel was the "Standard" logo. Remember the old Standard ignition products- coils, breaker points(Blue Streak!), rotors & caps? Yup, *That* logo- made me a lot more pleased with my purchase, that's for sure!(OK, you younger guys may not be familiar with the old Standard Ignition brand- but anyone over 40-45 should remember it.
)
So, back to your question- you might get a better valve by getting one from a stealership parts counter- or you might do just as well with one off the shelf/rack at any of the chain parts stores- or even WM. They're usually cheap enough that you can afford to experiment- or if your first guess didn't pan out, to just get a different one. And don't be surprised if you find the exact same unit being sold under several different brands.
