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What happens if you fill a car designed for 92 octane with 95 octane gasoline?

1 Answers

OwenAnn

07/29/25 12:26pm

95 octane gasoline has a higher octane rating compared to 92 octane, providing better anti-knock properties, which results in fewer engine knocks, quieter operation, and potentially improved engine power and reduced fuel consumption. However, since engines designed for 92 octane typically have lower compression ratios, they may not fully utilize the characteristics of 95 octane gasoline. This could lead to insufficient compression and incomplete combustion of the gasoline, potentially causing sluggish acceleration during driving. Additionally, 95 octane gasoline is relatively more expensive. Below are some related points: 1. Meaning of gasoline grades: The grade of gasoline represents its octane rating. The higher the grade, the higher the octane rating, indicating better anti-knock properties. In reality, the gasoline grade has no relation to the cleanliness of the fuel. 2. Misconceptions about high-grade gasoline: Many people believe that higher-grade gasoline is better, providing stronger engine power and better cleaning effects. However, this is incorrect. Using gasoline with an excessively high grade not only offers no benefits to the engine but may also cause adverse effects and is simply a waste of money. For example, incomplete combustion may more easily lead to carbon deposits. 3. It's also not advisable to fill a car designed for 95 octane with 92 octane: Similarly, if the manufacturer specifies a minimum requirement of 95 octane but 92 octane is used instead, the lower fuel grade may cause knocking and detonation, resulting in reduced power output.

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