Yogi 000,
Your last post, second paragraph is spot on.I could not have said it better myself.
Surely we have a Chemist, or paint Technician who could give us an answer as to why Vinegar is used.According to Sir Peter Hawker, Joe Manton used vinegar in his stock finishing oil. Vinegar is also used in most Furniture reviving polishes.
Can you get Liberon products over there?
if so you could try Liberon Finishing Oil a very good finishing oil indeed.