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Old 09-23-2008, 07:32 AM
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You can determine when the rings are fully sealed by watching compression test results rise and then stablize, this is the point where the change (not necessary) to syn could be made.. NOT BEFORE.

Seen this senario happen 100s of times over last 20-25 years when people use the "best oil" vrs a good breakin oil for fireup and initial ring seating.
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