Date: Tue, 7 Mar 2000 10:58:07 -0800 From: "John R. Weiss" <jrweissnopsamlobal*nospam*.net> Subject: Re: 900 Turbo oil consumption
In hot weather, 25W-50 will work fine. I used 20W-50 in my '82 900T when I lived in the Mojave desert. I also found that 10W-30 gives me an occasional oil light at idle when hot, but 10W-40 decreases those instances significantly. You shouldn't use any oil (less than 1 litre between changes). Switch back to the heavier oil and see if consumption decreases again... --------------------- John R. Weiss Lake Forest Park, WA www.tsca.net/puget/ Michael Rochfort <michaelnopsamam.netro.com.au> wrote in message news:yX3x4.2657$co1.721167nopsam0.optus.net.au... > What would be an acceptable level of oil consumption for an '83 900 Turbo? > > Mine has about 175,000km (110,000 miles) on the clock. The car has had a > history (now solved) of overheating. The head gasket has been recently > replaced, at which time the mechanic (a trusted relative) said that the > bores and pistons seemed to show little wear. No oil is visible in the > coolant or vice versa. There are no leaks to speak of. There seems to be no > smoke, except a small amount occasionally after a long idle. This clears > once underway again. > > One other perhaps related symptom is that the oil pressure warning comes on > momentarily with a heavy application of the brakes. I have seen this problem > before on my old 99. It was fixed by replacing the oil pressure switch. > > As a secondary question, what grade of oil is recommended for this car? My > owner's manual says 10 w 30, 10 w 40 or 5 w 50. These seem much too thin to > me. The oil on sale here in Australia (tropical in summer, never snows or > freezes in winter) are all 25 w 50 or so, and it is nearly impossible to > find any of the advised grades. I ask because the oil consumption has been > noticably higher since I changed to the thinnest oil I could find (15 w 40), > and the oil light problem has become more frequent as well. The car has used > a litre (quart?) of oil in the last 2000 miles.