See also:

Recommended Engine Coolant
When adding coolant, use only deionized water or soft water for your vehicle and never mix hard water in the coolant filled at the factory. An improper coolant mixture can result in serious malfun ...

General Checks
These are the regular checks you should perform when you drive your Hyundai or you fill the fuel tank. A list of these items will be found on page 6-4. ...

Spark plugs
Make sure to install new spark plugs of the correct heat range. ...