Date: Mon, 5 Nov 2001 22:04:11 -0000
From: "Huw" <>
Subject: Re: Does anyone use synthetic oils?

"MEN" > I doubt that it actually degrades much. But it will get just as filthy as > regular oil, and that's the reason I gave up on synthetic and went back to > changing every 3-4K. You are correct. The secret of an extended drain potential oil is to keep the crap in suspension while continuing to lubricate and clean. Diesel oil gets very dirty black looking but still does the job. In the case of extended drain intervals useing any SHPD specification, whether a synthetic formulation or not, the oil gets amazingly dark black but still performs its lubricating function while keepping its dispersion and suspension properties. The oil, if it meets MB228.5 or better, can last amazingly high mileages if bypass filtration is used in addition to the standard full flow, and oil analysis is carried out to confirm its suitability for service. A standard engine should not need an oil change more often than 10,000 miles if using a suitable oil, though the filter should be changed at or near the recomended schedule. Huw

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