Why can some turbocharged cars use lower-grade gasoline?
2 Answers
The reasons why some turbocharged cars can use lower-grade gasoline are: 1. The engine is specially designed; 2. The cylinder pressure is reduced. Refueling precautions: 1. Use automotive gasoline, as inappropriate fuel entering the fuel system may damage the fuel system and engine; 2. Do not use gasoline containing methanol or alcohol; 3. Avoid spilling fuel on the paint surface to prevent damage; 4. If the fuel tank door is frozen and cannot be opened, gently push or tap the fuel tank door to remove ice and open it; 5. Prevent excessive fuel pressure from causing spraying; 6. Insert the fuel nozzle deep into the tank to avoid fuel overflow or spillage, which may cause fire and explosion; 7. Touch the car body to release static electricity before opening the fuel filler cover or contacting the fuel cavity nozzle, and do not re-enter the vehicle during refueling to avoid generating static electricity.
I've been in the auto repair industry for several years and often see some turbocharged cars running on lower-octane fuel, mainly because modern engine control systems are so smart. These vehicles are equipped with a knock sensor that monitors combustion in real-time. If potential knocking is detected, the ECU automatically adjusts ignition timing and fuel injection, retarding spark to prevent issues. Additionally, turbocharging systems are designed with fuel adaptability in mind—features like compression ratio control and variable valve technology allow the engine to handle lower-octane fuel under increased boost pressure. While using 92-octane fuel short-term may only result in softer power and higher consumption, long-term use against manufacturer recommendations risks carbon buildup or component damage. Ultimately, technological advancements make turbo engines more flexible, lowering daily driving barriers.
