TOYOTA 2012 Matrix - Manual (Page 337)

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4-3. Do-it-yourself maintenance
NOTICE
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To prevent serious engine damage
Check the oil level on a regular basis.
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When replacing the engine oil
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Be careful not to spill engine oil on the vehicle components.
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Avoid overfilling, as the engine could be damaged.
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Check the oil level on the dipstick every time you refill the vehicle.
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Be sure the engine oil filler cap is properly tightened.