Convert from Mineral Engine Oils to Synthetic

chollyjohn

New Member
Sep 27, 2008
126
Richmond & Morattico, VA
Boat Info
1992 Sea Ray 310 Sportbridge - Only 41 Made by Brunswick
Engines
Twin 8.1L Mercruiser; 370HP each; Inboard Zurth Str8 Drives
I have always used regualr oils and as recommended by the engine manufactruers. Most recently, I am interested to convert from regualr oil to Synthetic. No questions about it, I am sold on the use of synthetic for better performance, lubrication and less breakdown of particles.
My question is to those owners or mechanics about what is the best procedure to change the oil and if purging the existing engine in a specific manner is :huh:necessary. I welcome any comments.
 

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