What is the reason for the heavy smell of engine oil in the car?

The engine oil in the car has a strong smell, which may be as follows: 1. The rubber tube of the carbon canister is aging, which is responsible for connecting the carbon canister and the throttle. With the increase of mileage, it will gradually age, leading to the leakage of gasoline vapor, thus smelling the gasoline smell in the car all the time. 2. When the gasoline is too full, the gasoline may flow into the carbon canister along the oil path. The function of carbon canister was originally used to absorb gasoline vapor. After soaking in gasoline, it is possible to spray too much gasoline vapor from the exhaust hole, especially when the air is in the external circulation state, the smell of gasoline is particularly serious.