If the gasoline octane is 95, does it meet the minimum octane requirement?

• A. No
• B. Only if ethanol blend
• C. Yes
• D. Only if engine tuned

Answer: (C)

Octane rating shows how much a fuel resists knocking, and the minimum octane requirement is the lowest rating an engine can tolerate without knocking under normal operation. A fuel rated at 95 octane provides more resistance than many engines need, so it meets that minimum requirement. You don’t need an ethanol blend or any special engine tuning simply to satisfy the minimum—higher octane is acceptable and can handle the engine's needs just fine.