Why do domestic turbocharged engines use 92-octane gasoline?
3 Answers
Using 95-octane gasoline in vehicles designed for 92-octane does not improve fuel efficiency, increase power, or protect the engine. Therefore, domestic turbocharged engines use 92-octane gasoline. Below are the differences between 95 and 92-octane gasoline: 1. Composition ratio: 95-octane gasoline contains 95% isooctane and 5% n-heptane, while 92-octane gasoline contains 92% isooctane and 8% n-heptane. 2. Anti-knock performance: 95-octane gasoline has higher anti-knock properties, whereas 92-octane gasoline has lower anti-knock properties. Here are some additional details: 1. Turbocharger: If the engine is equipped with a turbocharger, it is essential to use gasoline with an octane rating of 95 or higher. 2. Naturally aspirated engines: Naturally aspirated engines can use gasoline with an octane rating of 92 or higher.
I've noticed it's quite common to use 92-octane gasoline in domestic turbocharged cars, mainly for cost-saving and practicality. The engine design takes into account China's fuel usage habits, with compression ratios set moderately low and advanced injection technology employed to prevent knocking. 92-octane is significantly cheaper than 95-octane, saving considerable fuel costs in the long run. 92-octane is widely available at gas stations, making refueling convenient without the need to seek higher-octane fuel. After driving for several years, I've observed no power loss, simple engine maintenance, and low upkeep costs. Additionally, 92-octane provides stable combustion performance, proving reliable for daily urban and rural driving while meeting domestic emission standards. This design helps car owners save both effort and money, making high-performance vehicles more affordable with excellent cost performance.
As a car enthusiast, I understand that the ability of domestic turbocharged engines to use 92-octane gasoline is largely related to technical tuning. Engineers have optimized the compression ratio and ignition system, utilizing direct injection technology to reduce the risk of knocking, allowing stable operation even with 92-octane fuel. With 92-octane gasoline widely available at Chinese gas stations and its quality having improved, high-octane fuel isn't necessary. I've studied ECU control, which can adjust the fuel mixture in real-time to prevent pre-ignition issues. This design reduces operating costs, promotes market adoption, and ensures good engine durability, delivering consistent performance in traffic jams or long-distance driving with adequate power response. From an environmental perspective, 92-octane fuel produces cleaner emissions, aligning with domestic policies, making it highly practical overall.
