The term 'minimum octane' indicates that octane levels can be:

The term 'minimum octane' indicates that octane levels can be:

• A. Octane can be higher than 91.
• B. Octane must be exactly 91.
• C. Octane can be lower than 91.
• D. No octane requirement exists.

Answer: (A)

The key idea is that a minimum octane sets a floor for what fuel is acceptable. It means the engine is designed to run reliably on fuels that meet or exceed that octane level. So if the minimum is 91, fuels with octane 91 or higher can be used safely. Using a higher octane fuel is allowed and won’t harm the engine, though it may not provide extra benefit if the engine isn’t designed to take advantage of it. It’s not saying you must use exactly 91, and it isn’t saying there’s no octane requirement.

The key idea is that a minimum octane sets a floor for what fuel is acceptable. It means the engine is designed to run reliably on fuels that meet or exceed that octane level. So if the minimum is 91, fuels with octane 91 or higher can be used safely. Using a higher octane fuel is allowed and won’t harm the engine, though it may not provide extra benefit if the engine isn’t designed to take advantage of it. It’s not saying you must use exactly 91, and it isn’t saying there’s no octane requirement.