For a Hero Honda 100cc motorcycle, it is generally recommended to use engine oil with the specifications and grade specified by the manufacturer. In this case, since Hero Honda is the brand name, it's important to refer to the specific model's owner's manual or consult with an authorized Hero Honda service center for the recommended engine oil.
These viscosity grades provide good lubrication and protection for the engine under various operating conditions.
When selecting engine oil, it's advisable to choose a reputable brand that meets the required specifications and has the appropriate certifications, such as API (American Petroleum Institute) or JASO (Japanese Automotive Standards Organization) ratings.
Some popular engine oil brands that are commonly used for motorcycles include Castrol, Mobil, Shell, Motul, and Yamalube. However, it's important to check the owner's manual or consult with a professional to ensure the specific oil grade and brand recommendation for your Hero Honda 100cc model.
Remember to follow the recommended oil change intervals as mentioned in the owner's manual and ensure proper maintenance practices for the optimal performance and longevity of your motorcycle's engine.