Which phenomenon limits a turbocharger's effectiveness with low-octane fuel in high-compression engine?

💡 Explanation

When low-octane fuel is used with a turbocharger in a high-compression engine, increased cylinder pressure and temperature cause pre-ignition because the fuel auto-ignites before the spark. Therefore premature detonation occurs, rather than slower combustion, thermal shock, or injector clogging which involve different operational failures.

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