What is the difference between an engine that is burning oil and one that is leaking oil?
Newer car engines rarely burn or leak oil. This is because the factory seals, O-rings, gaskets, bearings and components are new and in good working order.
With higher mileage and age, seals and gaskets break down, allowing oil seepage.
Oil can subsequently enter the combustion chamber, where it burns and causes smoky exhaust.
Oil leaks not associated with the intake system or combustion chamber could stain the ground or road surface.
Automobile Association of Singapore
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