Break, curse, fix, repeat
Join Date: Feb 2007
Location: Bainbridge Island, WA
Thanked 2 Times in 2 Posts
Rep Power: 11
I use Chevron 15/40 in my Universal 5432 (M40) and she runs just fine. You can get it cheap at Costco too. And, the gallon jugs when cut right make perfect bailers for your dinghy.
More important than type of oil (given basic parameters) is when you change it and the fuel cleanliness and the thermostat setting/operating temp.
Just change it every 50-100 hours, keep fuel and filters clean, and run her at something above 180 degrees if she is fresh water cooled.
Bainbridge Island, WA
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