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What is the highest octane rating for gasoline?

2 Answers

GiannaRose

07/29/25 6:33am

Currently, the highest octane rating is 100# gasoline. Below is relevant information about gasoline: 1. Classification: Gasoline is divided into various octane ratings, commonly including 90#, 93#, 97#, 98#, etc. Some regions even offer 100# gasoline. These different ratings represent varying octane numbers—the higher the rating, the higher the octane number, indicating better anti-knock performance of the gasoline. 2. Octane Number: The octane number represents the gasoline's resistance to knocking combustion—the higher the number, the better the anti-knock performance. The gasoline octane number is a unit that indicates the gasoline's anti-knock performance under lean mixture conditions. Numerically, it equals the volume percentage of isooctane in a standard fuel that matches the anti-knock performance of the sample under specified conditions.

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JeremiahLee

08/12/25 9:58am

I have been driving for fifteen years and often use high-octane gasoline. The highest octane rating is 98, which allows the engine to run more smoothly, reduces knocking sounds, and is especially suitable for performance cars or high-compression engines. After filling up with 98-octane gasoline, the car accelerates more steadily, makes less noise, and feels like it's protecting the engine and extending its lifespan. Currently, the common options at gas stations are 92, 95, and 98-octane, with 98 being the most expensive. However, I've found that it is more fuel-efficient in the long run and cost-effective. If your car is old or has a turbocharger, using 98-octane can prevent shaking. It's also important to regularly check the fuel quality and avoid using the wrong octane rating, which could affect safety. Driving with peace of mind is crucial, so during regular maintenance, I also inspect the fuel filter to keep the fuel system clean. In summary, 98-octane is the top choice—just match it with your driving habits and the condition of your car.

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