Do I Need to Use Up All 92 Octane Gasoline Before Switching to 95 Octane?

[VeraDella]

It is recommended to completely use up the 92 octane gasoline before refueling with 95 octane, as this helps prolong the engine's service life. The reasons are as follows: 1. 92 octane and 95 octane gasoline have different stability levels. If mixed in large quantities, the gasoline's stability may be compromised. When driving with mixed gasoline, the engine may experience knocking or detonation, with noticeably increased vibrations, which can cause certain damage to the engine and lead to malfunctions. 2. When refueling, simply follow the instructions on the fuel tank cap. Of course, switching to a higher octane rating is not prohibited. However, based on practical experience, higher octane gasoline does not necessarily perform better nor provide additional engine protection. Many mid-to-high-end car engines have higher compression ratios, requiring more stable gasoline to reduce engine damage during combustion and extend engine life. Engines designed for 92 octane gasoline typically have relatively simpler structures and lower operational efficiency.