Final answer:
Technician B is correct; the API service symbol is on the oil bottle for identifying the correct oil type. The symbol indicates the oil's performance, viscosity, and energy conservation. Technician A's claim incorrectly places the symbol in the engine bay.
Step-by-step explanation:
Technician B is correct in saying that the API service symbol is located on the oil bottle to ensure the correct oil is being used. This symbol, also known as the API Donut, informs the user of the oil's performance level, viscosity, and energy-conserving properties. It is essential for consumers and professionals alike to reference this symbol to select the appropriate oil grade for their vehicle's engine, as specified by the manufacturer's guidelines.
Technician A's statement about the API service symbol being in the engine bay is incorrect. While the engine bay may have information regarding the type of oil recommended by the manufacturer, the API service symbol itself is found on the oil container's label.