Well it's almost like a sewing machine viscosity oil. A lot of arguments for when you are supposed to oil I try at least once a year. I don't play the B3 in our back room a lot honestly. It's an electro-mechanical instrument. A lot of seized up generators happen if it's not oiled. Sometimes guys will find old Hammond consoles and the generators require a lot of oil and time to sit for the oil to work it's way in to the tonewheels. I don't know too many people taking them apart unless there is an issue or for a restoration. Leslie's on the other hand need their motors oiled. They are easy to remove and sometimes need new oiling, tires, bearings are to be calibrated.