I've got a 2008 focus st 225, it might just be my ears playing tricks but when I boot it the turbo seems to make more noise.

I had it serviced about 4000 miles and 0/30 oil was used. When I had a chat with tim (that sorts out the cracked lines) he said to use 10/40 so I didn't know if that could be part of it?

Cheers for the help in advance