Increased "recommended" oil change interval - Saab 9-5 Bulletin Board - Saabnet.com
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Increased "recommended" oil change interval
Posted by Stephen Goldberger [Email] (more from Stephen Goldberger) on Mon, 28 Jul 2008 10:33:38
In Reply to: Re: 9-5 Engine Sludge Question, TG, Sat, 26 Jul 2008 04:11:22
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I believe this was limited to MY 2005, when Saab rationalized their recommendation to the highest "common denominator", a single grade: M1 0W40, and a single maximum change interval: 15,000 miles. Then in 2006 it was dialed back to the lowest common denominator: 10,000 miles for both 9-5 and 9-3, and M1 0W40. Both are wrong for 9-5s: 5000 miles, and the TBN, Nitration, and Oxidation numbers for the oil inevitably point to the need for an oil change, even with 0W40.
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