I read a long time ago that the detergent will destroy wicking.
Bud--


wrote:

Hi, Ron.

The detergency is a "red herring"- it certainly can't cause problems to
keep submicroscopic debris in suspension, whether or not you're going
to change the oil. Any SAE 10 vi (viscosity index) oil with an API
(American Petroleum Institute) grade on the label should be way more
than you need. Ditto 20 vi, really. These things don't turn at 10k
rpm. :')

This all begs the question "why doesn't mfg. use proper sealed
roller-bearings?"