Smoke in oil rod

Kikemec ...

if it were due to the deterioration of the rings (segments), I understand that the following should happen ...

the compression of the combustion chamber to the oil crankcase passes (that's why the smoke through the oil rod)

or, in reverse,

passes the oil to the combustion chamber (with the consequent gray smoke through the exhaust).

The second does not happen ... so I will change the degree or density - in order to increase the cold viscosity - (and brand - quality) of the oil to test ... (the smoke also comes out of the oil filling cap, in the valve cover, so I presume must see the problem with the density ...) Here the climate is tempered 22ºC of the annual average, without frost and without waves of heat ... –Severe Diesel Engine Service. I currently use 15W40 ...

mineral? Synthetic?
Shell Helix Diesel Super _ Mineral ... CG or CF?
ESSO MAXXOIL DIESEL _ MINERAL ... CG or CF?

Look at any oil, it serves you, I only have an eye that it is for diesel and that it is of the right measure, sometimes they say it is not that this is very thicker and things like that, it only occupies the one that corresponds and now, so that you try the steam, the exile of this is, keep in mind that any liquid that is exposed at evaporated temperature,