2005 Harley Davidson FLHTC - FLHTCI Electra Glide classic "primary oil change 1998" Questions

...oil out of the primary. Remove the outer primary cover. Remove the six screws in the clutch assembly and remove the clutch plates and steel plates. Soak your new clutch plates in oil overnight. ...

...oil tank under the bike it is a bolt with an allen bolt hole in the middle going from frnt to back the tranny bolt goes straight up in about the same spot and the primary is the small torx fastner at ...

what kind of and how much oil is used for and oil change of a 1998 dyna low rider SYN3 or HD 20w50 in engine, SYN3 Formula Plus in transmission and primary