Oil sludge and whistles Hello, I have found another source to my problem with the wheezing at the cold start. Here is very nice the problem with the oil, the oil sieve, the oil tank seal etc. and the effects of the well-known construction error explained UND BEBILDERT (!)http://www.saab-deutschland.de/…/saab_ersatzteile_technik_oel.htmlDue to the clarity I have moved this into a new thread..