Can 95 Octane Gasoline Be Mixed with Some 92 Octane Gasoline?
2 Answers
95 octane gasoline and 92 octane gasoline cannot be mixed. The reasons are as follows: 1. The engine compression ratios for 95 octane and 92 octane gasoline are different. 95 octane gasoline is suitable for engines with higher compression ratios. If a high-compression engine uses 92 octane gasoline, abnormal combustion may occur, leading to knocking. 2. Gasoline is produced by refining various gasoline components such as straight-run gasoline, catalytic cracking gasoline, and catalytic reforming gasoline, which are then blended with high-octane components. It is primarily used as fuel for spark-ignition internal combustion engines in automobiles. 3. At room temperature, gasoline is a colorless to pale-yellow, easily flowing liquid that is difficult to dissolve in water.
The issue of mixing 95 and 92 octane gasoline has given me much to ponder. The different octane ratings affect anti-knock performance, with 95 octane being more suitable for high-performance engines. If 92 octane fuel is added, the octane level averages out—for instance, mixing half 92 might lower it to around 93. This could lead to engine knocking under high speed or heavy load, producing a metallic pinging sound that not only reduces acceleration performance but also risks damaging components like pistons and spark plugs. Long-term, it can shorten engine lifespan and increase maintenance costs. I strongly advise strictly following the vehicle manual's fuel recommendations—don't penny-pinch only to incur greater losses. Mixing should only be a temporary emergency measure, never a habit, otherwise what saves pennies today may cost dollars tomorrow.
