gas mileage KIA Optima 2015 4.G Owner's Manual

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Maintenance
NORMAL MAINTENANCE SCHEDULE
The following maintenance services must be performed to ensure good emission control and performance. Keep
receipts for all vehicle emission services to protect your warranty. Where both mileage and time are shown, the fre-
quency of service is determined by whichever occurs first.
*1: If TOP TIER Detergent Gasoline is not available, one bottle of additive is recommended. Additives are available from yourauthorized Kia dealer along with information on how to use them. Do not mix other additives.
*
2: Fuel filter & Fuel tank air filter are considered to be maintenance free\
but periodic inspection is recommended for this mainte- nance schedule depends on fuel quality. If there are some important safety matters like fuel flow restriction, surging, loss of
power, hard starting problem etc, replace the fuel filter immediately regardless of maintenance schedule\
and consult an author-
ized Kia dealer for details.
*
3: The drive belt should be replaced when cracks occur or tension is reduced excessively.
*4: Inspect for excessive tappet noise and/or engine vibration and adjust if necessary.