Which type of fuel is commonly used in a turbo-charged engine?

Turbo-charged engines typically require fuels that can handle the increased pressures and temperatures associated with forced induction. AVGAS, which stands for aviation gasoline, is often used in piston engines and can be suitable for turbocharged configurations, particularly in smaller general aviation aircraft that utilize such engines.

AVGAS is formulated to provide good performance and reliability in aviation applications. It has a high octane rating, which helps to prevent knocking and allows for efficient combustion, especially important in an engine designed to operate under higher stress conditions like those found in turbocharging.

The other fuels listed do not align as closely with the requirements for turbocharged engines. AVTUR is primarily jet fuel, AVGAS is specifically designed for aviation piston engines, while AVTAG is typically used for turbine-powered engines. AVPIN is a type of aviation fuel that is less commonly used. Thus, AVGAS stands out as the most appropriate choice for a turbocharged engine context.