WOW! Surprised no one jumped on me for using halfords oil
I did think about it 
Ive used hellfrauds oil before in many cars especially as nowere else is open sundays. Just not in my mk6. As long as its been tested to the correct manufactures standard and so will be listed on the bottle as such.
Ive used alsorts of make oil in the leon over the years I just made sure it was the correct vw ###.## standard.
At the end of the day its your car and you can do with it what you want.