Why does a hot engine have more oil than a cold engine?
1 Answers
Reasons why the oil level is higher when the engine is cold compared to when it is hot: 1. Reason: When the engine is cold, all the oil settles in the oil pan. After the engine has been running for a while, the oil pump continuously circulates the oil, and some of the oil has not yet settled back. Additionally, fully synthetic oil has higher viscosity and lower fluidity, so the oil level appears higher when measured cold. 2. Optimal level: Pull out the dipstick to check the maximum and minimum levels. Add oil if it is below the minimum level, but do not add if it is above the maximum level. In such cases, excess oil should be drained. Below are some additional details about engine oil: 1. Increased fuel consumption: When adding oil, the oil level should be between the upper and lower limits on the dipstick. If too much oil is added, the oil volume will expand as the engine temperature rises, increasing the pressure in the oil chamber and the running resistance. This can reduce the car's power and increase fuel consumption. 2. Overfilling oil: If too much oil is added, the crankcase breather pipe may leak oil, and the increased crankcase pressure can loosen the oil seals due to the oil pressure, leading to oil leaks. 3. Cooling: Overfilling oil can affect engine cooling.
