What is the normal value of engine oil temperature?

[Greyson]

The normal working temperature of engine oil is generally between 70 to 90 degrees Celsius, with some local areas being higher. However, it usually does not exceed the water temperature. Additionally, higher speeds can lead to relatively higher temperatures, reaching 100 to 110 degrees Celsius. Reasons for excessively high engine oil temperature: Insufficient oil volume or excessively high oil level can easily lead to high oil temperature. Malfunction of the oil pump or insufficient oil pumping can cause inadequate oil pressure and poor heat dissipation. High cooling water temperature in diesel engines can prevent timely cooling of parts and heat removal, leading to overheating of parts and subsequent rise in oil temperature. Blockage of the oil cooler, insufficient oil pressure, and failure to achieve normal heat dissipation can more easily cause excessively high oil temperature. Clogging of the oil filter can cause oil to enter the main oil passage directly through the bypass valve, and impurities in the oil can exacerbate engine wear. Solutions for excessively high engine oil temperature: Regularly inspect the oil cooler and repair or replace it if problems are found. Regularly clean the oil filter and replace the filter element to ensure it functions properly. Periodically check the sealing between piston rings and cylinders to avoid air leaks, and replace or repair them promptly if issues arise. Ensure proper clearance between bearing shells and journals, and repair any problems immediately.