oil change

Hey everyone, Basically what's the deal with engine oil now specifying a manufacturer? Eurocarparts have tripple QX oil which now states - for GM application, or VAG or Ford. I know I need 5w30, but do I need engine oil that specifies my car's manufacturer? I'm trying to service my new (old)...

So like a typical dick head I decided to try and service my car myself, and I've made all the typical dick head mistakes you'd expect from someone who doesn't know what they're doing. Non the less, I intend to learn for next time. So when I got around to changing the oil. Removed the old oil...