Can 5w20 be replaced with 5w30 as required by the manufacturer?

[McJuliet]

The manufacturer's requirement of 5w20 can be replaced with 5w30. The number before the W represents the viscosity of the oil at low temperatures. The smaller the number, the higher the viscosity and the better the protection effect. The number after W refers to the viscosity grade of the oil at 100 degrees Celsius. The larger the number, the higher the viscosity. It should be noted that when replacing oil with different specifications, it is best to drain the oil from the engine and then refill it with new oil. Try not to mix different types of oil. The difference between 5W30 and 5W20 motor oil is the high-temperature viscosity. 5W30 has higher viscosity, better high-temperature protection performance, and better sealing. However, higher oil viscosity is not always better. Excessive viscosity can also affect the engine. Due to the increased viscosity, a series of effects occur, increasing the engine's operating resistance, which in turn reduces engine power. If this continues for a long time, it will affect the engine's service life and also increase fuel consumption.