Working on a vintage "Made in England" FRONT hub (Hercules Bike with Sept 1958 Sturmey Archer-SW rear hub) and was wondering - why not just plug the oiler cap hole and use modern bearing grease. Seems like that would be a lot less messy since I wouldn't have to occasionally add oil and deal with the excess oil leaking onto places where your don't want that (like the braking surfaces on the rim). The only potential drawback that I can see is that the cups on the hub have a more "open" shape to them than modern hubs and perhaps they would not contain the grease in the cups as well as modern hubs where the bearing cups seem to be a "tighter" design that conforms more closely to the shape of the bearings.
The cap for the oiler broke off and I used a cut-off 10-32 brass screw to plug the oiler hole and it seems like it would be a lot less trouble to just go with grease. I realize that is not an option with the rear 3-speed hub since the internals need the lubrication that the regular oil additions provide.
Anyone tried this and regretted it afterwards?