Kia Optima: Specifications & Consumer information / Recommended lubricants and capacities
To help achieve proper engine and powertrain performance and durability, use only lubricants of the proper quality. The correct lubricants also help promote engine efficiency that results in improved fuel economy. These lubricants and fluids are recommended for use in your vehicle.
Recommended SAE viscosity number
Engine oil viscosity (thickness) has an effect on fuel economy and cold weather operating (engine start and engine oil flowability). Lower viscosity engine oils can provide better fuel economy and cold weather performance; however, higher viscosity engine oils are required for satisfactory lubrication in hot weather. Using oils of any viscosity other than those recommended could result in engine damage. When choosing an oil, consider the range of temperature your vehicle will be operated in before the next oil change. Proceed to select the recommended oil viscosity from the chart.
An engine oil displaying this API Certification Mark conforms to the international Lubricant Specification Advisory Committee (ILSAC). It is recommended to only use engine oils that uphold this API Certification Mark.
Air conditioning system
We recommend that you contact an authorized Kia dealer for more details. ...
Vehicle identification number (VIN)
■ Frame number
The vehicle identification number (VIN) is the number used in registering your
vehicle and in all legal matters pertaining to its ownership, etc.
The number is punched on the fr ...
Other information:
Kia Optima DL3 2019-2024 Owner's Manual: Installing a Child Restraint System (CRS)
After selecting a proper child seat for your child, check to make sure it fits properly in your vehicle. Follow the instructions provided by the manufacturer when installing the child seat. Note these general steps when installing the seat to your vehicle: Properly secure the child restrai ...
Kia Optima DL3 2019-2024 Owner's Manual: Climate control air filter
Filter inspection The climate control air filter should be replaced according to the Maintenance Schedule. If the vehicle is operated in severely air-polluted cities or on dusty rough roads for a long period, it should be inspected more frequently and replaced earlier. When you replace the cl ...
