The Hero Hunk 2016 version is designed to run on petrol, also known as gasoline. Octane is not a fuel but a rating system used to measure the resistance of fuel to engine knocking or pinging. In most regions, regular petrol available at fuel stations is suitable for motorcycles like the Hero Hunk.
Octane ratings typically come in different levels, such as 87, 89, and 91, among others. These ratings indicate the fuel's resistance to premature ignition or knocking. However, motorcycles like the Hero Hunk with standard compression ratios generally do not require high-octane fuel.
Using the recommended fuel type, which is regular petrol, ensures proper engine performance and fuel efficiency for your motorcycle. It is always a good practice to refer to your motorcycle's user manual or consult with the manufacturer or authorized service center for specific recommendations regarding fuel type and octane ratings for your Hero Hunk.