Neither. It's a vapor (gas).
This exhaust gas is a complex mixture of gases, liquid and solid particles.
liquid. think of what you put into your car.
carbon monoxide is in exhaust gas
liquid. think of what you put into your car.
Engine exhaust.
carbon dioxide
It comes out of your exhaust, in the engine it combusts making your car propel forward, the vaporized gasoline exits your exhaust.
The black gunk that comes out of the exhaust pipe when starting the car is probably carbon buildup within the exhaust system. Carbon buildup happens when the engine is not burning fuel as efficiently as it can.
Carbon monoxide comes out of a car. This colorless gas that is released from a car's exhaust is poisonous when inhaled in a highly concentrated form.
Clean the mouse nest out of the air cleaner.
Steel, Coolant, refrigerant.
Exhaust leak? Vacuum leak?