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Old 07-21-2010, 12:41 AM   #1
FCAV
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Join Date: Feb 2007
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Default School me on Synthetic

What's the 4-1-1 on running synthetic oil vs. conventional oil? Does it really improve the lifespan of your engine by a considerable amount? Does it make any sort of sense to switch to synthetic from conventional after already running conventional from the onset of the vehicle's life?
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