The New Regal requires 95 octane gasoline because all models are equipped with turbocharged engines. Using higher octane gasoline can reduce the likelihood of engine knocking. The higher the octane rating of gasoline, the better its anti-knock performance. Knocking is an abnormal combustion phenomenon in the engine. When the piston is in the compression stroke, it moves upward to compress the combustible mixture, increasing its pressure and temperature. If the gasoline's anti-knock performance is poor, the combustible mixture may ignite spontaneously before the spark plug fires, resulting in knocking. Knocking can damage the engine, and severe knocking may even cause piston fractures or connecting rod deformation. To prevent knocking in the engine, it is necessary to use higher octane gasoline. When refueling, it is important not only to choose the correct octane rating but also to select high-quality gasoline. Every car has manufacturer-recommended gasoline octane specifications, usually clearly indicated on the fuel filler door, specifying the required octane rating. Therefore, as long as you strictly follow the manufacturer's recommended octane standard, you won’t go wrong. Moreover, the octane rating only represents anti-knock performance, not cleanliness or purity, so avoid blindly using higher octane gasoline. If you use unnecessarily high-octane gasoline, it may lead to excessively high combustion temperatures, incomplete combustion, and damage to the engine valves or increased emissions. Similarly, cars that require high-octane gasoline should not switch to lower octane fuel, as this may cause sluggish acceleration, engine overheating, abnormal wear, increased fuel consumption, or even severe engine damage.
