Quoted from vid1900:The old Bally oil was super light weight stuff.
I wish somebody still had a bottle to have the viscosity measured.
The Zoom stuff is SAE 15 - non detergent.
If you could come up with it I have a viscometer at work. I believe there are a few different API standards for vis test so i would need to know which one. Basically its just a matter of what temp the product needs to be for the test.