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Can the Hongqi H5 use 92-octane gasoline?

1 Answers
DelAutumn
07/29/25 3:50pm
The Hongqi H5 can use 92-octane gasoline, and this model is suitable for 92-octane fuel. This fuel standard can be found in the vehicle manual and on the fuel filler cap. Of course, the Hongqi H5 can also use 95-octane gasoline, which has better anti-knock properties, but for an engine designed to use 92-octane fuel, the difference is minimal. 92-octane gasoline is more suitable for the Hongqi H5: The Hongqi H5 is equipped with a turbocharged engine. While most turbocharged engines require 95-octane gasoline, the Hongqi H5 can run on 92-octane gasoline. For gasoline, different octane ratings indicate different levels of octane content. 92-octane gasoline has an octane rating of 92 and a heptane rating of 8, making it suitable for mid-range vehicles. Higher-octane gasoline has a higher octane rating, which means better stability. Gasoline is a mixture, and the chemical composition of different octane ratings is relatively similar, with strong anti-knock properties. However, to ensure vehicle safety, it is recommended to use the specified fuel separately. The difference between 92 and 95-octane gasoline lies in their octane ratings and quality levels, as explained below: Different octane ratings: 92-octane gasoline contains 92% isooctane and 8% heptane. 95-octane gasoline contains 95% isooctane and 5% heptane. Different gasoline quality levels: The octane rating of gasoline represents its quality. Higher-octane gasoline has better anti-knock properties, which allows the engine to run more smoothly, reduces wear and tear, and provides better protection for the engine. It is recommended that vehicles designed for lower-octane gasoline will not be damaged if higher-octane gasoline is accidentally used. However, the increased octane rating can alter the fuel's ignition point, leading to delayed combustion in the engine. This results in reduced engine performance and thermal efficiency, leading to poorer power output. Using lower-octane gasoline in a vehicle designed for higher-octane fuel can cause engine knocking. This is because the lower octane rating reduces the fuel's ignition point, causing premature combustion during the compression stroke. If combustion occurs before the spark plug ignites, resistance is created during the upward stroke, making the engine run very unstably. Mild knocking may only increase noise without significant engine damage, but severe knocking indicates serious engine issues, affecting driving stability and causing abnormal wear on pistons and cylinders, potentially leading to engine seizure. If the wrong octane gasoline is accidentally mixed or used, simply refueling with the correct octane gasoline next time will restore normal operation. Some drivers believe that using higher-octane gasoline can improve performance, but this is unnecessary if the engine's compression ratio does not require it. At best, higher-octane gasoline may offer slightly better cleanliness and lower carbon emissions.
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