Blower Motor Lubrication?

At 53 years old, the oil/grease has all dried out. Our '62 Dart does the same, and I am due to pull it to lube it. The sooner it is done, the better. Use a light grease, not a lithium grease, and not WD40 or Marvel Mystery; they are hard on the winding insulation. Clean out the old grease/oil with straight alcohol. Getting any grease into the bearings is the trick; it might require disssembly, but doing that is something I don't yet know about. If light grease cannot be put in, then a 20W or 30W, non-detergent motor oil is my next choice.