At least in the case of the 507.00 the "certification" debate is moot: Amsoil European Car Formula 5w30 is MANUFACTURER APPROVED for 504.00 and 507.00
They list a lot of specs that the oil MEETS, but then in bold print they specifically list MANUFACTURER APPROVALS: VW 504.00 and 507.00
It is CERTIFIED by Volkswagen to meet 504.00 and 507.00 That's what "Manufacturer Approval" means, and is the same wording every other "Certified" product uses. Unless Amsoil is outright lying. (And if you believe that then there is no convincing you, period.)
-mickey
p.s. I was just checking to see if Mobil 1 is "certified." Guess what? IT'S NOT, if you're putting it in a Ford or most GM products. It also "meets" certain ACEA, API and ILSAC specifications, but there is no "certification."
It is MANUFACTURER APPROVED for GM DEXOS-1 specifically (complete with certification number) and for Honda/Acura. Nobody else. Not VW, Audi, Porsche, Mercedes, Hyundai, Toyota, Nissan, Fiat, Chrysler, BMW, Yugo, Hudson.......ANYBODY. Just Honda/Acura and certain GM cars. That's from Mobil's own product data sheet.
As I said in a previous comment: It is pure fantasy to believe that ANY oil is "certified" by every manufacturer, or even by most of them. You are ALWAYS going by the word of the oil manufacturer. But is Ford going to void your warranty if you use Mobil 1? I don't think so.
The only evidence that Mobil 1 meets most manufacturer specs is that Mobil SAYS it does. Just like Amsoil. So enough already with the "certification" nonsense. I can't believe a decade later this is even still a debate.
I submit to you that if you want a VW-approved oil meeting 507.00 then Amsoil is one of the very few options out there. Don't you just love irony?