Oil change Kia Optima 2001 - 2010 | Haynes Manuals
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The sump plug is located on the base of the engine, and it is accessed from underneath the car
Don't forget to place a suitably sized receiving tray in place
With an oil catchment tray in position, use a 17mm spanner or socket to carefully remove the sump plug and fully drain the oil. When the sump has emptied, wipe clean the sump plug area with a paper towel and re-fit the sump plug and washer
Replace (new) sump plug and washer. Do not over-tighten