Here to help . . .
Join Date: May 2010
Location: United Kingdom
Alfa suggest that 1l per 1000 miles is acceptable, but obviously 1l per 150 miles is a lot worse and a cause for concern.
You need to rule out oil leaks first. The TS is a leaky dirty engine normally, but you are looking for drips and fresh wet oil. It should be very noticable if all that oil is leaking out. You may well notice Esso digging up your driveway trying to hit oil too!
Anyway, the rattles you mentioned, if coming from the variator has nothing to do with the oil use. The ONLY connections possible between oil consumption and rattles (this is not including the possibility that you have two problems - 1 making a rattle and the 2nd using oil etc) is the following:
1/ Piston Rings/Piston Slap - the pistons, rings and/or bore is worn causing a poor fit and oil is being burnt in the cylinders. I have had a few TS's with sticky rings but not normally the oil control rings therefore they were suffering from low compression and not smoke.
2/ Varitator solonoid/oil feed problems - the Variator Solonoid is fed through a couple of small holes in the inlet manifold. IF these are leaking (which you would see imo) you COULD have a variator rattle from lack of oil and a leak causing the loss of oil. To be honest, I find this very hard to believe as you would notice oil drips everywhere you parked.
There is other possibilities but these are so unlikely I'll leave it as the above.
Valve stem seals would cause a puff of smoke when you pull away from lights etc but would not cause a rattle. I have never known a TS suffering from worn valve stems and 80k miles is nothing for these engines.
Bare in mind that the rattle could be anything from tappets to pistons and the oil consumption could be anything from leaks to heavy wear or internal damage but running on the principle that 2 things don't go wrong at once, I would start with the above and go from there.
Do a compression test and go from there imo.
*Removed by OA*