Butterchurn, you have just opened a hornet's nest. There are as many types, kinds, and varieties of patch lube as there are shooters.
Be prepared for the fun to begin.
Personally I use a "Moose Milk" made from the following formula (Beware there are as many definitions of "Moose Milk" as there are folks using it.)
Moose Milk
Castor Oil - 3 oz
Murphy's Oil Soap - 1 oz
Witch Hazel - 4 oz
Isopropyl Alcohol (91%) - 8 oz
Water (distilled) - 16 oz
Shake before using and dampen your patches, they shouldn't drip. You may want to soak them and then let them dry and then re-dampen for better effect.
I am also currently trying out a new lube of 1:5 Ballistal to Water mixture. It also seems to clean pretty good too. Once less container of liquid to carry around.
:peace
PS Borebutter is ok. The best way to use it I've found is make little sandwiches of a dab of borebutter and two patches, stack them up and wrap in saran wrap and microwave for 15-30 seconds or until completely melted. Store them in a period container and use them until they are gon.