Consequences of Using Incorrect Oil Utilizing an incorrect oil type, such as a heavier conventional 10W-30, can negatively impact the 2019 Optima’s fuel economy and power delivery. 4-liter inline-four engine, the recommended oil type is 5W-20 synthetic blend or full synthetic.
2019 Kia Optima Oil Type Guide: Choosing the Right Oil for Your Engine
This stability is particularly important for the turbocharged models that generate significant heat under load. Improved resistance to oxidation and sludge buildup.
Better performance in extreme temperature ranges. However, if you frequently engage in severe driving—such as short trips, towing, or high-speed highway racing—reducing the interval to 5,000 miles is advisable.
2019 Kia Optima Oil Type Guide: Choosing the Right Blend
Using the wrong grade or failing to meet the manufacturer's standards can lead to increased wear and reduced fuel economy over time. Oil Change Intervals and Maintenance Kia recommends changing the oil in the 2019 Optima every 7,500 to 10,000 miles under normal driving conditions.
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