Continuing the discussion from Homogenizer Project - Another Step Forward:
I wanted to answer this in a new topic and it would send the og topic off the rails.
Oxidation is generally the foe of e-liquid, however, there is one particular circumstance where I feel it works as a friend (IMHO).
I will not post the article in question as it is a negative article but drop me a PM if you want the link.
Here is a quote that covers what I consider to be the only exception to the oxidation rule.
We all know the BS (my opinion) surrounding DAAP and I suspect those of us that have been around for a minute or two know how delicious diacetyl soup actually is. Now a few flavours contain acetoin (the first A in DAAP) (sorry @Steampugs I mistakenly quoted acetyl propionyl rather than acetoin in our chat the other night).
Anyhoo here is a quote from the study and my basis for saying that there is a case where oxidation is a good thing - always open to having my mind changed.
… acetoin generates diacetyl in e-liquids. We found diacetyl formation in all acetoin-containing e-liquids, but it is not an acetoin-contaminant. Diacetyl concentrations were proportional to acetoin content, grew over time, and formation was accelerated by nicotine. E-liquids stored for up to 18 months contained significant diacetyl, and reduced acetoin levels, showing that acetoin is a long-term diacetyl source.