In a vehicle, where are you most likely to find the engine oil specifications?

The engine oil specifications are primarily detailed in the owner's manual because it contains comprehensive information about the vehicle's maintenance requirements and recommendations. This manual is designed to guide vehicle owners on everything from routine maintenance schedules to specific details about the type and grade of oil suitable for the engine.

While the oil filler cap can sometimes include basic information about oil type or specifications, it is not as comprehensive as the owner's manual. The trunk and underneath the vehicle do not typically contain any relevant information regarding engine oil specifications; these areas are not intended to house documentation about engine performance or requirements. The owner's manual remains the authoritative resource for understanding the exact specifications for engine oil, ensuring that vehicle owners can maintain their vehicles properly.