Compression Ratio 10:1, Should I Use 92 or 95?
2 Answers
Engines with a compression ratio of 10:1 can use both 92 and 95 gasoline. Here are detailed explanations about 92 and 95 gasoline: 1. Engines with a compression ratio of 10:1 can use both 92 and 95 gasoline. If the compression ratio is below 11, it is better to use 92 gasoline, while if it is above 11, 95 gasoline is preferable. 2. The octane number of gasoline only represents a parameter of its anti-knock performance. A higher octane number indicates better anti-knock performance and is not related to purity. 3. The anti-knock performance of gasoline is somewhat related to engine operation. Generally, the compression ratio of household car engines is relatively low, so 92 gasoline with lower anti-knock performance is used.
Regarding the fuel choice for a car with a 10:1 compression ratio, I've driven high-compression vehicles for years, and my experience suggests prioritizing 95-octane gasoline. A 10:1 compression ratio means higher pressure and temperature during compression. Using 92-octane fuel with lower anti-knock properties can easily cause engine knocking—that disturbing "knocking" sound—which damages the engine and increases fuel consumption. A friend of mine used 92-octane fuel, and the engine wear was shockingly rapid, eventually requiring costly repairs. In contrast, 95-octane fuel burns more smoothly, delivers consistent power output, and extends engine life. Currently, the price difference between 92 and 95 is minimal—just a few dozen yuan more per month for peace of mind. Of course, checking your car's manual or fuel cap recommendation is the safest approach; don't rely on intuition when choosing fuel.
