Re: saab 9000 aero - Dark Oil - Saab 9000 Bulletin Board - Saabnet.com
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I've never put much worry into the color of used oil. As John mentioned, oil can capture the very small particles that aren't trapped by the filter. Probably more of a factor to oil color are that many chemicals in the oil change opacity when heated. The characteristics of those additives are chosen for their ability to maintain lubricity, neutralize acids, etc, not to keep clear when heated.
If you want to know if oil is 'dirty', drain a pint or so into a clean glass jar, and let it sit for a few weeks. If a black scum settles to the bottom of the jar, that's dirt and debris. But oil turning black can just be the effect of normal heating.
posted by 192.249....
Posts in this Thread:
- saab 9000 aero - Dark Oil, KyleKoivu, Mon, 19 Feb 2007 10:33:38
- Relax, andym, Mon, 19 Feb 2007 15:10:18
- Did you look at the Restore color - black?, Dag, Mon, 19 Feb 2007 14:03:52
- Re: saab 9000 aero - Dark Oil, Ari
, Mon, 19 Feb 2007 12:31:41 <-- Viewing This Message - Re: saab 9000 aero - Dark Oil, John Jacob, Mon, 19 Feb 2007 10:46:53
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