TOYOTA 2012 Yaris Hatchback - Manual (Page 223)

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4-3. Do-it-yourself maintenance
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Engine oil consumption
A certain amount of engine oil will be consumed while driving. In the follow-
ing situations, oil consumption may increase, and engine oil may need to be
refilled in between oil maintenance intervals.
●
When the engine is new, for example directly after purchasing the vehicle
or after replacing the engine
●
If low quality oil or oil of an inappropriate viscosity is used
●
When driving at high engine speeds or with a heavy load, when towing,
or when driving while accelerating or decelerating frequently
●
When leaving the engine idling for a long time, or when driving frequently
through heavy traffic