Difference 5 -20 vs 10-30 oil?

Answer 1

The numbers in motor oil ratings, such as 5W-20 and 10W-30, indicate the oil's viscosity at different temperatures. The first number represents the oil's viscosity in cold temperatures (the "W" stands for winter), while the second number indicates its viscosity at higher temperatures. A 5W-20 oil flows more easily at low temperatures compared to 10W-30, making it better for colder climates. Conversely, 10W-30 maintains its viscosity better at higher temperatures, which can be advantageous for warmer environments or high-performance engines.