No research made on samples of wood would ever tell us what happens to a finished clarinet. There would be data about the respective or combined absorption of water and oil in the fibers but this could turn out to be absolutely meaningless in relation to crack preventing of a finished instrument.
In any case although I am not an expert at chemistry I know enough of it and about wood and trees to at least be able to read and understand the premise of the study and the conclusions.
To throw a spanner in the works, I do not oil clarinet bores, I do clean wooden clarinets in water. Some clarinets crack during there life cycle, some do not, for me it has to do with the maturity of the wood and its originally drying process pre machining
I absolutely agree with this, as I said within a previous post, there is a very good chance that oiling the clarinet is only done for traditional reasons which probably have their roots (!) in the fact that clarinets were not always made of the black or rose woods which we use now.
Flutes, clarinets and oboes were made of softer woods like boxwood. Bassoons are still made of very soft wood like Maple and often, modern bassoons, have a sleeve of some material which prevents the wood splitting which in historical instruments was rather more the norm than it was the exception.
I think that at the time when instruments were not made of these hard, oily, exotic and expensive woods, the tradition arose to wax or oil the wood and it did indeed make sense, back then.
When , much later on, we started making these woodwinds with black or rose woods ( there are actually many types of each used) we kept on doing something that was not necessary for these woods, impervious to absorbing water over a very small amount, because it didn't actually prevent the splitting of these woods,
Splitting happened with black or rose woods alright, but was not caused by the normal use under normal circumstances, and it was (and is) quite literally something that was ingrained in the wood grain and structure , its aging an machining. Let's also not forget that inserting all kinds of bits and pieces IN the wood distributes the the stress unevenly and in itself might create the presuppositions for splitting.
The majority of clarinets in the world are oiled, according to the Doctor, with wrong oils or not oiled at all.
Despite this, some have survived hundreds of years of these mistreatments and apparently survive being cleaned, as Simso tells us, with water only in a world which postulates that a clarinet would require regular cycles of total immersion for a wood that is only superficially absorbing any oil or water.
Many sell, at great expense, the services of their ritual bath in different types of oil. The clarinet " mikveh"! To revive, rejuvinate and wash all sins away.
Mind you this is the same world which tells us that one literally blows out the life out of a clarinet and that once that has happened only, maybe, this immersion in the purifying oil bath would give the blow of life , the " ruach "back to the clarinet!
In my opinion there is a very good chance that oiling instruments inside or outside does absolutely nothing to their chance to not split and as for many things which we do to prevent something happening things might happen if we do or if we don't regardless.
On the other hand it is also very possible that no ill effect can come from oiling. Also, I am almost sure that, as far as oil go, the Doctor's oil is probably the best and only researched product out there! So, if you must oil, then use that one.
Chances are that it won't do anything good or bad and that your clarinet would look beautiful ( and that, in itself would be money well spent!).
One other thought.
Orsi produced, at a certain time, a series of clarinets in olive wood, they were stunning, as far as I know they all cracked in a few years and Orsi quickly abandoned that ill advised project.