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Old 11-09-2009, 08:09 PM   #10 (permalink)
RobertSmalls
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Quote:
Originally Posted by Frank Lee View Post
The problem with old oil isn't just contaminants floating in it; various chemical additives get depleted over time. So a thorough cleaning process by itself is not enough for returing used oil to service.
Does this mean bypass oil filtration won't allow extend oil change intervals?
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