Sonata 2011 Owners Manual

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Air Conditioning Refrigerant
Check the air conditioning lines and connections for leakage and damage. Check air conditioning performance according to the relevant shop manual if necessary. ...

Adding Oil
If the oil level is close to or below the "L" mark, add oil until it reaches the "F" mark. To add oil: 1. Remove the oil filler cap by turning it counterclockwise. 2. Add oil ...

Checking the engine oil
Engine oil is essential to the performance and service of the engine. It is suggested that you check the oil level at least once a week in normal use and more often if you are on a trip or driving ...