Is there any impact from mixing 92 and 95 gasoline?

[EloiseFitz]

Mixing 92 and 95 gasoline does have an impact, which may lead to engine knocking or reduced power output, and in severe cases, it can cause fuel system malfunctions. This is because different fuel grades have varying octane ratings and anti-knock indices. Long-term mixing can result in engine carbon buildup and fuel line blockages. Generally, mixing various grades and types of gasoline won't cause noticeable issues in the short term, but it should not be practiced over an extended period. If a vehicle is recommended to use 95 octane or higher, it's best to avoid using 92 octane unless absolutely necessary. Since 92 octane has weaker anti-knock properties than 95, excessive mixing will lower the overall anti-knock performance of the fuel in the tank, increasing the likelihood of knocking. In mild cases, this may cause delayed ignition and reduced power, while severe cases can render the engine unable to function properly.