Date: Thu, 9 Mar 2000 08:46:19 -0800
From: "wgmoore" <>
Subject: Re: 900 Turbo oil consumption

once an engine has run any length of time on a thicker oil, it's unlikely it would ever get the same oil pressure back with a thinner oil. The thick oil gets (wears)clearances it needs so switching back to the thin oil it then runs at a lower pressure. "Michael Rochfort" <> wrote in message news:yX3x4.2657$ > 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. > > Thanks in advance for any replies. > -- > > Michael Rochfort > > > To reply remove "nospam" from email address > > >

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