Can the Accord use 95 octane gasoline?
1 Answers
According to the official vehicle user manual recommendation, the Accord should use 92 octane gasoline and should not use 95 octane gasoline. In addition to checking the appropriate gasoline grade in the vehicle user manual, the Accord can also check it on the fuel tank cap, which will also be marked. Usually, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should choose 92 octane gasoline, while those with a compression ratio between 10.0-11.5 should choose 95 octane gasoline. However, with the use of some new technologies, the gasoline grade cannot be determined solely by the compression ratio. A high compression ratio can also be tuned to use low-grade gasoline because, in addition to the compression ratio, there are other influencing factors, such as ignition timing, turbocharging technology, and Atkinson cycle technology. Generally speaking, the higher the gasoline grade, the higher the octane number and the better the anti-knock performance. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. If the Accord occasionally uses the wrong gasoline grade, it only needs to switch back to the correct gasoline grade after use. However, if the wrong gasoline grade is used for a long time, the following effects may occur: It is recommended that vehicles with low-grade gasoline will not be damaged if high-grade gasoline is mistakenly added, but the increase in octane number will change the ignition point of the fuel, causing the engine to experience delayed ignition. That is, the engine's working capacity and thermal efficiency will be reduced, and the actual feedback experience is that the power becomes worse. It is recommended that vehicles with high-grade gasoline using low-grade gasoline will cause engine knocking. Because the octane number is too low, the gasoline ignition point will be reduced and ignited prematurely during the compression stroke. Once the spark plug does not ignite before the compression stroke, the rising stroke will encounter resistance. This resistance will cause the engine to run very unstable. If it is only a slight knocking, the noise will increase, and the damage to the engine is not obvious. If there is obvious knocking, it means that the engine's working condition is very serious. The vibration not only affects driving stability but also causes abnormal wear of the piston and cylinder, and severe cases may even lead to cylinder scoring.
