This is a revision proposal that adds two informative annexes. The first one basically contains a table of correlation data and some extra wording to the basic procedure, without changing the scope. With this information ISO 3924 becomes an updated document describing the method as actually in practice, without changing the basic procedure to fall back on. Data as presented in this Annex allows reference in modern, global specifications, such as for aviation fuels. Secondly, because ISO 3924 is extensively used there is need for a faster analysis. Without any instrumental adaptation it is possible to decrease analysis time by a factor 5.The second informative Annex describes what is involved to do this.