Change the oil frequently and you should be fine. I disassembled a 'blown' VX motor and the number one cylinder and crank are no different than the other 5. There are tiny lubrication holes that if clogged, can cause oil starvation to the crank (which is what happened to this one) and cause the bearing to spin and get flattened like a piece of tin foil.

EGR (Exhaust Gas Recirculation, i.e emissions) valve / tube clogging can NOT cause engine failure - it will cause a check engine light and the computer will adjust and not run as well with it clogged.

Clogged PCV (Postive Crankcase Ventilation) valve will NOT cause engine failure except in the case where the pressure build up blows out the rear main seal and oil is lost, starving the engine of oil. But you would see this leak typically before that much oil is lost. Changing or at least cleaning the valve with carb cleaner every 10-15K is still a good idea and interestingly enough is not mentioned in the maintenance section.