Can e92 and 92 be mixed?

[Santiago]

92-octane gasoline and 95-octane gasoline cannot be mixed because they have different isooctane contents. 92-octane gasoline is suitable for engines with low compression ratios, while 95-octane gasoline is suitable for engines with high compression ratios. If 92-octane gasoline is added to a car that originally requires 95-octane gasoline, abnormal combustion may occur, leading to engine knocking. Knocking not only damages the combustion chamber but also directly affects the normal operation of the engine, and in severe cases, it may cause engine damage. If 95-octane gasoline is added to a car that originally requires 92-octane gasoline, although it will not damage the engine, 95-octane gasoline is more expensive than 92-octane, resulting in unnecessary costs. Differences between 92, 95, and 98-octane gasoline: Standard gasoline is composed of isooctane and n-heptane. Isooctane has good anti-knock properties, and its octane number is defined as 100; n-heptane has poor anti-knock properties and is prone to knocking in gasoline engines, so its octane number is defined as 0. If the gasoline is labeled as 92, it means that the gasoline has the same anti-knock properties as standard gasoline containing 92% isooctane and 8% n-heptane. The same principle applies to 95 and 98-octane gasoline. How to handle adding the wrong gasoline: If the gasoline added has a higher octane rating than the car's requirement (e.g., adding 95-octane when 92-octane is specified), simply consume it normally and then refill with 92-octane gasoline afterward. If the gasoline added has a lower octane rating than the car's requirement (e.g., adding 92-octane when 95-octane is specified), you can add a high anti-knock fuel additive. Alternatively, you can drain the fuel tank and refill it with 95-octane gasoline. To determine the correct gasoline for your car, refer to the vehicle's user manual or check the fuel grade labeled on the fuel tank cap.