Jan 19, 2019 · A higher octane number means that the fuel-and-air mixture can withstand more compression before detonating. Premature detonation can result in an engine making knocking, pinging or rattling sounds. High octane fuel, therefore, helps reduce or …
So a “high-performance engine” has a higher compression ratio and requires higher-octane fuel. The advantage of a high compression ratio is that it gives your engine a higher horsepower rating for a given engine weight — that is what makes the engine “high performance.”. The disadvantage is that the gasoline for your engine costs more.
A “high-performance engine” has a higher compression ratio and requires higher-octane fuel to prevent it from prematurely igniting fuel before the spark plug does it. So, octane does not enhance the explosion in the cylinder like most people think.
That’s why performance cars with higher compression engines require higher octane (premium) fuel. In essence, higher octane fuels are compatible with higher compression engines that can increase efficiency and performance while potentially reducing emissions by combusting the fuel more completely.
By David Morley, 09 Jul 2016 Car Advice. An engine needs controlled, properly timed explosions. So, the higher the octane number (its octane rating) the less likely that particular grade of petrol is to explode under pressure. That means high performance engines (which tend to compress their fuel more to get a bigger bang) can run on it without
Selecting the Right Octane Fuel. What is octane rating? Octane rating is the measure of a fuel’s ability to resist “knocking” or “pinging” during combustion, caused by the air/fuel mixture detonating prematurely in the engine. In the U.S., unleaded gasoline typically has octane ratings of 87 (regular), 88–90 (midgrade), and 91–94 (premium).
About octane ratings. Octane rating is a measure of a fuel’s ability to resist ‘knock’. The octane requirement of an engine varies with compression ratio, geometrical and mechanical considerations and operating conditions. The higher the octane number the greater the fuel’s resistance to knocking or pinging during combustion.
So, the higher-octane fuel is not something to pamper a new car with but rather help keep an older car running properly. In addition, premium gasoline has some other selling points.
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