Is it necessary to use 95-octane gasoline for new cars?

[JuneFitz]

Whether a new car requires 95-octane gasoline depends on the specific brand and model. Generally, most naturally aspirated engine models can use 92-octane gasoline. It is advisable to follow the fuel requirements specified in the vehicle's manual. More details are as follows: 1. In terms of basic composition, gasoline has two important components: n-heptane and isooctane. The octane rating represents the proportion of isooctane. For example, 92-octane gasoline contains 92% isooctane and 8% n-heptane. 2. Different octane ratings primarily prevent engine "knocking." Generally, vehicles designed for 95-octane gasoline should never use 92-octane, as it can easily cause cylinder knocking. 3. Using 95-octane gasoline in a vehicle designed for 92-octane is less severe and at least won't cause "knocking." There is no scientific basis for the claim that higher-octane gasoline saves more fuel during highway driving. To save fuel, focus more on route planning and driving habits, such as avoiding sudden braking to reduce kinetic energy loss.