Ah yes, oil consumption!!
OK. A few years back, I used to own a 155 V6. That thing drank oil but I never saw any blue smoke out of the exhaust or anything. I was quite perplexed for the entire time I owned the car. The manual for that car stated 1L of oil every 1000km to be acceptible (depending on driving style.) The car went on to do 155000 miles+ when I eventually sold it. I never did get to the bottom of the oil consumption, I just used to check it every week.
Now I replaced that car with a toyota MR2. I used to drive that VERY enthusiastically and it never used a drop!! I had a Celica after that, no problems there either.
Now I've recently bought a 156 TS and guess what??? It likes a drink of oil, so I reverted my to my old regime of checking the oil level weekly (and topping it up).
I'd had the car a couple of months when the big ends went. Turns out the previous owner had let the timing belt snap, fixed the top end but not bothered with the bottom end of the engine! I paid ££££'s to get the engine completely (and I mean completely!) rebuilt:-
Valve stem oil seals
Full set of shells
Con Rod (one was bent)
Crank (my old one was cracked)
Timing Belt and Kit
Since the rebuild, I've been taking it very easy during the run-in period. I was advised to keep the revs below 3000RPM for the first 500 miles. I've done well over 2000 miles now and still keeping the revs down (scared of breaking it again I suppose).
I've been keeping an eye on my oil level, and it's using it. So my point is this. On a recently rebuilt 2.0L TS engine with 2000 miles on the clock, I've got to top the oil up, I guess it's just normal for Alfa's??? Unless the engine's smoking, I'd try not to worry about it too much, just check your oil and top it up.
There is one thing I have noticed though... I get two oil level readings when I check either side of the dipstick?? Has anyone else noticed this?