Hi.
I use a mineral oil, MAXIMA Classic 50w . Its a straight 50W oil, Its made for air cooled engines. Like Ducati and more.
-Extremely high-performance oil designed with the latest technology additives-
If I use a syntetic oil, I will have more the 6-8 drop on the floor.
Ps. Maxima is made in US.
Thanks
DPHANS