HI,
I had the oil light come on today in Manchester, so i stopped and bought some Castrol EDGE OW 40 i think it was ?
Whats the best oil to use please ?
You should be ok with 0w-40 but it is not adviseable to just shove any old oil in without checking its specification. You were lucky this time, although 40 weight might be a tad too viscous for the your engine (1.4 TSI IIRC?). You must make sure that what ever you top up with meets or exceeds VW's specs or you'll potentially be looking at some premature wear and/or expensive damage.
The light coming on is not good, it might be worth while getting into better (weekly) habits in terms of your under bonnet checks - especially with a tuned engine! Run that turbo dry and you'll be in all sorts of trouble.
After spending all that money on the body work, it would be criminal to let the engine go because it's run dry. I'd also be a little concerned as to why a fairly new engine is using so much oil too. When was it last serviced?