Millers do a 10w40 (spec'd twinnie grade) which is fully synthetic. I was thinking of trying that instead of Mobil 10w40 semi-synth for a change. I don't know why I would as the Mobil 10w40 semi has done me proud through recent years through all it's branding changes (now Super 2000 I think). But, we are Alfa people so I guess will always be a little strange!
One thing that does surprise me on the oil debate, and I really don't want to start another marathon thread, is that when my car was new (98) main dealers were recommending Selenia Racing (10w60 fully snth) as an "improve performance" option on first oil change. This made me think about using 10w60 fully synth Mobil1 "New Life" on my last change which is also designed for older cars they say. But everyone on here told me to stay away from it and even Mobil suggested the only fully synth I should use was 5w50 so I kept with the 10w40 semi.
In the meantime, a knackered radiator, rear calipers which pass the MOT but leave the discs untouched (rusty to the eye), missing connections for the alarm box, the infamous window problem and rusted air box screws I can't get off to change a 4 year old filter should be occupying my mind instead of oil grades lol