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1990C4S 1990C4S is offline
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Join Date: Sep 2009
Location: North of You
Posts: 9,160
I would not use synthetic for the first few fills. The rings may need to seat, that will happen better with dyno oil.

I would also follow the automotive break-in procedure, do not run the engine continuously at any one rpm range.

After that, a turbodiesel synthetic is fine.
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Old 11-17-2017, 05:19 AM
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