Piston rings

[hala]

In many topics sticking piston rings is mentioned. Engine oil in the passed was not as good as todays to keep the engine clean. By using a modern 15W/40 ACEA E7 oil well known to keep the engine clean, is still the risk high to this problem when using the engine relatively light. Is the Zetor engine more sensitive to this problem than other brands? Very unusual to read about this problem in other forums.
Hazze

 

[mikep]

Older zetors such as the crystals can glaze the bores if too good an oil is used. Be careful and use correct grade or can be rather time consuming, whatever you do don't use an oil improver in these or will ruin them, I found out the hard way.

 

[hala]

I thought that was true just for new or renovated engines for the first say 100 h and after that a better oil could be used with advantage. Is the glaze problem as big for engines running for a while as for new ones?
Hasse