Hi Pastor,

overseas in Germany there are quite a few posts of newbies complaining about heavy sucction (ie. too much draw) and fatty residues on their razor
after excessive use of oil. Oils and fats will get succed into the grain of the leather like you explained.
But if it is too much for the leather to hold simply removing the excess won´t do because the leather will start to release oil on its own during use.
It completely depends on the type of leather and the dyeing process,
how much oil a leather can take.
But I think that no additional oil is needed if the leather is new