Can 5w20 engine oil be used for long-distance driving?

1 Answers
VonChase
07/29/25 10:24pm
5w20 engine oil is not recommended for long-distance driving. The number after 'w' in 5w20 is 20, indicating that the oil viscosity at high temperatures is not very high. During long-distance driving, the engine runs continuously, causing the internal temperature to rise steadily. 5w20 oil has a lower viscosity grade at high temperatures, so while it might be acceptable for occasional long trips, it is safer to avoid using it or switch to a higher viscosity oil. Engine oil, or engine lubricant, is a substance enhanced with additives in base oil, primarily containing anti-wear additives, detergents, dispersants, and multi-grade oil viscosity index improvers.
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