What is the reason for the smell in the car?

The car smells of engine oil, most of the time because the engine leaks oil.

Other possibilities are relatively small, and it is possible that the rubber tube of the carbon tank is aging. The rubber tube connecting the carbon canister and the throttle will gradually age with the increase of mileage, resulting in gasoline vapor leakage. Go directly to the repair shop to replace it.

If the gasoline is too full, it is possible to discharge excessive gasoline vapor from the exhaust port, and the gasoline should be added between the lowest scale and the highest scale.

Materials such as plastics and rubber are widely used in automobile interiors.

Air conditioning filter caused by the smell, clean the filter regularly.