Fit uses 92 or 95?
1 Answers
According to the official car manual recommendation, Fit should use 92 gasoline. In addition to checking the suitable gasoline grade in the car manual, you can also check it on the fuel tank cap, which will also be marked. Usually, the gasoline grade can also be determined according to the compression ratio of the engine. Cars with an engine compression ratio between 8.6-9.9 choose 92 gasoline, and cars with an engine compression ratio between 10.0-11.5 choose 95 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 adjusted to use low-grade gasoline. Because in addition to the compression ratio, there are other influencing factors, such as ignition advance angle, turbocharging technology, Atkinson cycle technology, etc. Generally speaking, the higher the gasoline grade, the higher the octane number and the better the anti-knock performance. 92 gasoline is rich in 92% isooctane and 8% n-heptane; while 95 gasoline is rich in 95% isooctane and 5% n-heptane. If the Fit occasionally uses the wrong gasoline grade, you only need to switch back to the correct gasoline grade after use. However, if the wrong gasoline grade is used for a long time, it will have the following effects: It is recommended that low-grade vehicles mistakenly using high-grade gasoline will not cause damage, but the increase in octane number will change the ignition point of the fuel, causing the engine to have delayed ignition. That is, the working ability and thermal efficiency of the engine will be reduced, and the actual feedback experience is that the power becomes worse; It is recommended that high-grade vehicles using low-grade gasoline will cause engine knocking. Because the octane number is too low, the gasoline ignition point will be lowered and ignited in advance 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 imperceptible knocking, it will only increase the noise, and the damage to the engine is not obvious; if there is obvious knocking, it means that the working condition of the engine is already very serious. The vibration not only affects the driving stability but also causes abnormal wear of the piston and cylinder, and severe cases may even cause cylinder scoring.
