Will the oil decrease if the car is parked under the sun?

[Braxton]

If a car is continuously exposed to the sun, the oil will evaporate, with a small amount potentially escaping through ventilation holes. Here are the relevant details: 1. Evaporation: Evaporation is a physical phenomenon that occurs with all liquids. The higher the temperature, the faster the evaporation rate. Liquids with lower density evaporate more easily than those with higher density. Gasoline and alcohol have similar densities (gasoline being slightly lower), making them both prone to evaporation. 2. Sealing: In theory, gasoline will not evaporate if it is sealed in an airtight tank. However, in cars, fuel is stored in fuel tanks, which are not completely airtight and have some ventilation to the atmosphere. Therefore, gasoline stored in a car will inevitably evaporate to some extent.