Is it mandatory to use 95-octane gasoline for Volkswagen models with T?

[DelClara]

Volkswagen models with T must use 95-octane gasoline. All T-equipped Volkswagen models are equipped with turbocharged engines, which require 95-octane gasoline to prevent engine knocking. 95-octane gasoline has a higher octane rating, and gasoline with a higher octane rating offers better stability. Using more stable gasoline reduces the likelihood of knocking. Most turbocharged engines require 95-octane gasoline because the temperature and pressure inside the cylinders are higher during operation. Knocking is an abnormal combustion phenomenon in the engine. During the compression stroke, the engine's piston moves upward to compress the air-fuel mixture, increasing its temperature and pressure. If the air-fuel mixture ignites before the spark plug fires, this is known as knocking.