johnydi 0 Report post Posted August 10, 2017 It's that time of the season and I need to change my oil for the first time in a 2000 262 cruiser with the 5.7 liter mercruiser engine....what type of viscosity does everyone here recommend? and does this engine use synthetic oil or conventional ? Share this post Link to post Share on other sites
Rip5 0 Report post Posted August 22, 2017 This is a Ford vs. Chevy topic. Use what you prefer. Fact: your boat did not come new with synthetic oil. You can switch if you like. Your boat does not have cats', and synthetic oil is really overkill, since it get's changed at least once per year anyway. Or just use what is recommended Mercruiser /Quicksilver 25W-40 Share this post Link to post Share on other sites
