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Old 03-17-2005, 05:17 PM   #6
Brucelee
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Join Date: Jun 2004
Location: Des Moines, IA
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Yes, oil degrades over time with or without usage.

With a good synthetic, a year is about right.




Quote:
Originally Posted by PeterJoyce
Thank you, but is time a factor in oil changes or just mileage?
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