What will the manufacturer's manual recommend regarding engine oil?

The recommendation to use the Society of Automotive Engineers (S.A.E.) number is correct because the S.A.E. number indicates the viscosity characteristics of the oil, which are essential for optimal engine performance and longevity. The number helps in selecting the appropriate type of oil based on the operating temperature and conditions, which can vary greatly.

Using the correct S.A.E. number, as outlined in the manufacturer's manual, ensures that the oil maintains its protective and lubricating properties under varying temperatures, enabling the engine to function smoothly and efficiently. The use of a designated S.A.E. number also helps to minimize wear and tear on engine components and can enhance fuel efficiency.

While checking oil levels daily is good practice for maintaining proper oil levels, it does not directly address the type of oil that should be used or the importance of viscosity. The recommendation to change oil every month may not be applicable for all engines, as oil change intervals typically depend on a vehicle's usage and type of oil used. Additionally, the suggestion to use synthetic oil only may not apply to all vehicles, as some engines are designed to operate with conventional oil. Thus, adhering to the S.A.E. specifications outlined in the manufacturer's manual ensures that the right oil is used for optimal engine performance