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Subject: Use of Synthetics in older engines (1970's)
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Date: 08/15/01 at 8:00 AM
Posted by: Reece
My mechanic has told me that older engines (my '77 XJ6) have larger oil passages to allow for (once) inevitable sludge build-up; and that using a clean running synthetic will cause a loss of oil pressure - presumably by cleaning out the passages.
Is this something to worry about or might he be just passing on an old wives tale?
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