Originally Posted by mikeg205
Run it my car last 1000 miles before oil change and in my fuel - 2001 C320 Benz - runs much better with seafoam in gas - as a flush in crank case.
Change oil so often in boat don't need it crank case. I add Hy-Per Lube made by these guys listed in below link for extra wear protection on my flat tappet engine...
+ VR1 Synthetic 20w50
And yes more fluid will displace oil yes 5+ but the seafoam will reduce viscosity a bit. Run it in my outboards they run very well season to season with it.
What is the best way to use Sea Foam in an outboard? Was thinking of trying it out my 225hp Johnson Outboard. Any info would be great, thanks.