What to Do If You Mixed 92 and 95 Octane Gasoline?
2 Answers
If there are no abnormalities while driving, you can continue using the mixed fuel. Next time you refuel, consider purchasing a bottle of gasoline additive and then switch back to 95 octane gasoline. If there are signs of knocking or detonation while driving, it is best to drain the mixed fuel and refill with 95 octane gasoline.
I've been driving for over 20 years and have encountered situations where I mixed 92 and 95 octane gasoline several times. At first, I was quite worried, but the mechanic told me it's not a big deal. 92 octane gasoline has a lower octane rating and weaker anti-knock capability, while 95 octane is higher and more durable. When mixed together, the octane rating averages out, and the engine's computer will automatically adjust the ignition timing to adapt. Occasional mixing generally doesn't affect the engine much—you might just experience slight shaking or noise while driving. My advice is to calmly drive until you finish this tank of fuel; don't waste money trying to pump it out. When it's nearly empty, refill with the correct octane rating. Long-term mixing could potentially harm spark plugs or oxygen sensors, so always pay attention to the recommended value on your fuel cap. If you're still concerned, drive to a professional shop for a free computer diagnostic to ensure everything is functioning properly.