Kia Optima: Inspection - Engine Oil. Repair procedures - Lubrication System - Engine Mechanical System - Kia Optima TF 2011-2018 Service ManualKia Optima: Inspection

1. Check the engine oil quality.

Check the oil deterioration, entry of water, discoloring of thinning. If the quality is visibly poor, replace the oil.

2. Check the engine oil level.

After engine warm up stop the engine wait 5 minutes then check the oil level. Oil level should be between the "L" and "F" marks on the dipstick. If low check for leakage and add oil up to the "F" mark.

Do not fill with engine oil above the "F" mark.
Selection Of Engine Oil

Recommendation : 5W-30 ACEA A5 (If not available, refer to the recommended API or ILSAC classification)

API classification: SL or SM above

ILSAC classification : GF3, GF4 or above

ACEA Classification : A3 or A5

SAE viscosity grade : Refer to the recommended SAE viscosity number

For best performance and maximum protection of all types of operation, select only those lubricants which :
1. Satisfy the requirement of the API or ILSAC classification.
2. Have proper SAE grade number for expected ambient temperature range.
3. Lubricants that do not have both an SAE grade number and API or ILSAC service classification on the container should not be used.

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