Depends on which engine you are referring to.
Oil filler cap cover the hole in the engine where engine oil is added
Oil sputter is going to be a normal thing if the oil cap is not on while the engine is running. The engine should never be run with the oil cap open. The engine actually has less compression when the oil cap is open, and this could hurt the engine.
cap that covers the oil fill hole in engine
The engine turns off when the oil cap is removed because the engine is designed to do so. When the oil cap is removed a vacuum leak is created which causes the engine to turn off.
In the engine, usually through an oil filler cap.
To open the engine oil cap on a 2001 Ford Mondeo, first ensure the engine is cool and the vehicle is parked on a level surface. Locate the oil cap, which is typically found on top of the engine, marked with an oil can symbol. Twist the cap counterclockwise to unscrew it, and lift it off. Be cautious not to drop debris into the engine while the cap is removed.
look on the engine for a cap that says oil
The chain under the oil cap is typically referred to as the "oil cap chain" or "oil fill cap chain." This chain connects the oil cap to the engine or valve cover, preventing the cap from being lost or dropped during maintenance. It's a small but important feature that helps maintain engine cleanliness and safety.
Engine oil goes in the oil cap which is right on the front of the engine and has a picture of an oil can on it.
At the engine oil filler cap. On a 350 GM engine it is located on one of the valve covers, and is easily found. If you cannot find this cap, then you have no business working on this engine.
There is a cap on the valve cover that says oil or has a picture of an oil can. Remove the cap and add oil.
To top up engine oil in a Fiat Punto, locate the oil filler cap, which is usually marked with an oil can symbol. Open the hood and find the cap on the engine block. Remove the cap and use a funnel to pour in the appropriate type of engine oil, checking the oil level with the dipstick to avoid overfilling. Always ensure the engine is cool before adding oil.