Should Kia K3 use 5W20 or 5W30 engine oil?

[DelAlana]

Dongfeng Kia K3 can use either 5W-20 or 5W-30 engine oil. The differences between these two types of engine oil are as follows: 1. Different oil viscosity. The main difference between 5W-20 and 5W-30 lies in the high-temperature viscosity of the oil. The only difference between 5W-20 and 5W-30 is the number at the end. 5W-20 has lower viscosity (viscosity between 5.6-9.3), which is relatively more fuel-efficient and makes the vehicle feel lighter when driving, while 5W-30 has higher viscosity (viscosity between 9.3-12.5), which is relatively more fuel-consuming and makes the throttle feel heavier, but the engine noise is slightly quieter. 2. Different sealing performance. The higher the viscosity, the better the sealing performance. The number after 'W' in 5W30 and 5W20 represents the high-temperature viscosity, so 5W30 has better sealing performance than 5W20. However, a higher number is not always better, because the higher the viscosity, the greater the friction, and the greater the engine power loss.