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dgmgohl · 08-02-2020, 07:14 AM

I just had my 255 Merc Flathead rebuilt, and the company that rebuilt it said I should use PennGrade motor oil. When checking on Amazon, this stuff is expensive! Almost $100 per case of 12. Has anyone heard of this oil? Does anyone have a suggestion on what is the best to use in a newly rebuilt engine?

08-02-2020, 07:14 AM	#1
dgmgohl Member Join Date: Aug 2018 Posts: 53	PennGrade Motor Oil I just had my 255 Merc Flathead rebuilt, and the company that rebuilt it said I should use PennGrade motor oil. When checking on Amazon, this stuff is expensive! Almost $100 per case of 12. Has anyone heard of this oil? Does anyone have a suggestion on what is the best to use in a newly rebuilt engine?