An engine that burns oil will usually foul the spark plugs. That, in turn will cause ignition misfire, higher emissions and likely damage the catalytic converter.
Causes of oil pollution in Venezuela are oil spills and they are a major producer of oil so that causes a lot of oil pollution
an oil leak
oil getting by the rings causes white smoke and oil dripping out of the tailpipe.
engine burning oil
Not enough oil pressure and / or the oil channel is plugged
Friction
oil
oil
Oil spillage
Excessive wear, or lack of oil. Or both. Generally lack of oil is what causes the excessive wear.
Low oil pressure. Such as a bad oil pump.
An oil leak.