Oil Compatibility Explained: Mixing 5W30 with 5W40—Safe?
With many engine oil types and viscosities available, vehicle owners often find themselves at a crossroads. It is common, especially when deciding whether mixing different oil viscosities, such as 5W30 with 5W40, is safe and compatible. Mixing 5W30 with 5W40 engine oil is generally safe in the short term and unlikely to cause immediate damage … Read more