What type of antifreeze do you use in a Kia Optima?

For a Kia Optima, it's recommended to use an ethylene glycol-based antifreeze that meets the specifications outlined in the owner's manual. Typically, Kia vehicles require an antifreeze that is either a blue or green color, often labeled as Kia's own coolant or a compatible equivalent. It's crucial to use a 50/50 mix of antifreeze and distilled water for optimal performance and protection against freezing and overheating. Always consult the owner's manual for specific recommendations and guidelines.