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Old 12-10-2015, 08:41 AM   #28
Ex Sailor
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City: Toronto
Join Date: Nov 2015
Posts: 271
We too just got our new ( to us ) boat with twin Cummins 210 HP @ 2500 hrs. on them and the boat came with a ton of Shell Rotella 15 - 40 oil. I am a fan of Synthetics but don't know if I should mess with what was used previously.
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