Should the Crown use 92 or 95 octane gasoline?
2 Answers
According to official requirements, the Crown should use 95 octane gasoline. The specific details of 92 and 95 octane gasoline are as follows: 95 octane gasoline: 95 octane gasoline consists of 95% isooctane and 3% n-heptane. High compression ratio engines should use high octane gasoline. If low octane gasoline is used in a high compression ratio engine, it may cause abnormal combustion, resulting in knocking, increased fuel consumption, and reduced driving power. Although high compression ratio engines can also use low octane gasoline, it is not advisable to choose gasoline solely based on compression ratio. Instead, follow the manufacturer's recommendations for fueling. 92 octane gasoline: 92 octane gasoline has an octane rating of 92 and contains 8% n-heptane, making it suitable for mid-range vehicles.
As a Crown owner, I believe using 95-octane gasoline is more suitable. I've driven this car for over three years, and while 92-octane is slightly cheaper, the engine noise increases noticeably after filling up, occasionally accompanied by slight vibrations that affect driving comfort. The manual generally recommends higher-octane fuel. The Crown's engine has a high compression ratio, and using 95-octane helps prevent knocking and protects engine components. Knocking produces a pinging sound, and prolonged use of lower-octane fuel may accelerate wear, leading to potentially higher repair costs. In terms of fuel consumption, 95-octane provides more stable performance, with city driving averaging around 8L/100km. Filling up at reputable gas stations also ensures better fuel quality. Saving a bit on fuel costs daily is not as worthwhile as investing in proper car maintenance, and acceleration on highways feels smoother with 95-octane.
