10W-30 engine oil is a multigrade motor oil designed to work in a wide range of temperatures. The “10W” indicates its viscosity at cold temperatures, helping the engine start smoothly in winter, while “30” represents
The difference between 10W-30 and 10W-40 engine oil is their thickness at operating temperature. Both flow similarly when cold (10W), but 10W-40 is thicker at high temperatures, offering better protection for older engines or high-heat
5W-20 and 5W-30 oils share the same cold-start viscosity (“5W”), but 5W-30 is thicker at operating temperature than 5W-20. This makes 5W-20 slightly better for fuel economy and cold performance, while 5W-30 offers stronger high-heat
Quick Answer: 0W-20 offers superior cold-start protection and flows better in extreme cold (below 0°F), making it ideal for northern climates. 5W-20 provides adequate protection for most conditions and costs less, making it better for
