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Old 10-09-2019, 11:15 PM   #12
Comodave's Avatar
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 5,752
I would change the oil each year anyway so no way I would pay the extra to use synthetic oil. I just did a quick check on Amazon and synthetic Rotella is about $63 per gallon. Regular Rotella is $16. So for 4.5 gallons that is an extra 211 per engine, not worth it. Maybe if I was doing 1000 hours per year.
Boat Nut:
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