Here is some info that I believe regarding lubrication of engineering plastics. (It uses good source material.)
https://www.machinedesign.com/mechanical-drives/engineering-essentials-lubrication-tips-plastic-gears-and-more-part-2I would not use WD-40. It has a low vapor pressure, meaning that it will evaporate to nothing fairly quickly. At least the carrier will, and I'm not sure about the rest.
They caution that Moly may attack some plastics--but are not specific about which ones.
They do suggest that silicone greases are generally suitable, so of the ones you have listed, I would try some of that, but test the friction to see if you can live with it. All you need is a very thin film.
Delrin is pretty inert, so most things will not readily attack it. The referenced article recommends a synthetic for longer life of the Delrin. I have been known to use Vaseline, a petroleum jelly, which obviously is not a synthetic. I have not had any issues in the past, but now will reconsider my choice....
Thanks for bringing this up,
Dave
Ref.: More info from DuPont on polymer bearings. Bellcranks are low speed (~20 rpm), intermittent motion, small angle mechanisms, but with fairly high loads for their size. (eg. a 1/8" shaft.) The design recommendations are to run against the hardest metal you can, and for it to have the best surface finish possible. The material itself has a magical property that supposedly reduces stiction to a value below running friction, which is really critical for our application. To whatever extent any lubricant would compromise this property, you should avoid that combination. For long life applications, DuPont recommends lubrication. See page 53.
http://www.dupont.com/content/dam/dupont/products-and-services/plastics-polymers-and-resins/thermoplastics/documents/General%20Design%20Principles/General%20Design%20Principles%20for%20Bearings.pdf