Re: Which Oil
I used Halfords own brew, fully synth I think it's 10/40. It is the same oil as Millers synthetic (ie it is repackeged) apparently which is supposed to be decent tack. You can get offers in Halfords, mine cost 20 ukp.
Alfa recommmend 10/60 I think for enthusiastic driving, but some would say that that is a bit thick for UK temperatures, unless you are constantly ragging your engine.
I'm sure thee are a few oil experts round here but in reality any semi-synth will do the trick, as long as you don't buy real cheap rubbish.
Beware, the sump plug on my 147 is a torx fitting, an absolute beggar to extracate...mine got chewed up as the previous dealer had done it up far too tightly. Also you'll need some ramps/axle stands/a pit as if it is as low as the front as the 147 you can't get your arms underneath.