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Depending on various factors, the 2015 Kia Sportage might come with either a 2.0L 4Cylinder engine or a larger 2.4L 4Cylinder engine. Each engine type requires a specific kind of motor oil, but they both hold the same amount. The 2.0L engine needs 5.1 quarts of SAE 5W-30 full synthetic oil, while the 2.4L engine requires 5.1 quarts of SAE 5W-20 oil. You can use a slightly different oil weight, like +10, in a pinch, but it's not recommended unless necessary. For example, you can temporarily swap SAE 5W-30 for SAE 5W-20, or SAE 5W-40 for SAE 5W-30. It's best to avoid this if possible, as using a thicker oil can increase friction, leading to more wear and potentially causing early engine issues over time.
In 2015 Kia Sportage, the type of engine oil you should use depends on the trim level due to variations in engines. For the EX and LX models, it is recommended to use 5W-20 or 5W-30 viscosity oil. As for the SX model, it is best to use 5W-30 or 5W-40 viscosity oil.