its just a pain having to drop the car off and having no car etc.
The S4 needs any 502 oil
As for 10W-30 vs others. It won't cause any issues.
I didn't even know anyone made a 10w30 oil.
Surely they give you a loan car, I mean thats the whole reason people buy brand new cars isn't it? For zero hassle incase of issues? Having to drop it off and walk to the bus stop is what you do with a 10 year old car not a brand new warranted car through a main dealer?
Regardless of the oil i'd be unhappy having my interior stabbed with screwdrivers.
Out of interest, what engine did you go for?
The world is a bigger place than the UK. 10W-30s are more popular in Asia and the US
For any reason in particular?