I've had several K series Kohler's over the years.
If they are pretty "fresh and tight" I run Amsoil small engine 10w30 or 10w30 hdeo (rotella or delo)
A couple I've had that had a little blow by I ran 15w40 in them and that worked well.
If they are pretty "fresh and tight" I run Amsoil small engine 10w30 or 10w30 hdeo (rotella or delo)
A couple I've had that had a little blow by I ran 15w40 in them and that worked well.