As I said, possible prevention, Slick 50 is not an oil additive, it does not alter the oil in any way, it actually coats all the moving parts that come into contact with the oil, with ptfe and is a long standing proven product, if nothing else, it protects against damage on cold starts and lasts for 80km's.
PTFE will not affect the oil, you're right, it affects the engine components. It will not stick to the parts you want it to stick to (Cams, bearings) but WILL stick to the low pressure areas like pipes and FILTER.. thus blocking it.
From someone who knows their stuff:
'Others depend upon the total myth that PTFE
powder coats engine internals and reduces friction. It doesn’t do anything or the sort. It just blocks the oil filter. The AA tested one of these overpriced PTFE concoctions (‘Quick 60’ or something) very thoroughly back in the 80s. They stated: ‘This is an expensive way of coating your oil filter’.;
ref - http://www.alfaowner.com/Forum/alfa-...d-answers.html
I've personally seen the results of adding this stuff to cars.. it's not good.. but that said, i'm talking worst case scenario too. I personally wouldn't take the risk, esp with an alfa that hardly needs any excuses to go wrong.
And - http://www.skepdic.com/slick50.html
The perceived benefit of PTFE is to coat the internals with a protective layer, especially for cold starts... If that's the outcome you want, change to an Ester based oil. Motul 300V is terrific Ester based oil which will properly do what you think the PTFE will do. And remember, FLOW is much more important that 'stick'. The key is to get the oil flowing as fast as you can, which means a fully synthetic thinner oil, preferably with esters in it, so you also get the benefit of a protective coating too. That is unless you have a 2.0JTS motor in which case, 10/60 is the right viscosity. Again though, a fully synth, ester based grade 4 oil would be ideal.
Some info on Esters - http://www.bobistheoilguy.com/esters...ic-lubricants/