Disadvantages of high octane fuel

When we talk about the disadvantages of high octane fuel. One widespread misconception is that using premium or super-grade gas will increase your vehicle's performance and mileage. And make the engine run more smoothly because higher octane ratings are always preferable.

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Do the math! Except for a small percentage of vehicles that require high-octane fuel, using the plus or premium-grade fuel won't do anything for your car other than reducing its efficiency.

Probably have witnessed your friends using high-octane fuel. They probably recommended it because doing so will improve your car's performance, speed, and other features. At least you are aware of high-octane fuel, even though this is untrue.

Disadvantages of high octane fuel

Disadvantages of high octane fuel

There are many fuel types, including ordinary, premium, and, that you may notice at the petrol station. These different fuels are always priced differently, but when it comes to vehicles, those prices also have different meanings. The fuel type you should use if you want your engine to last a long period will be recommended when you buy your car. 

In high-performance automobiles with turbochargers and superchargers, high-octane fuel is typically used. Now let's see what are the disadvantages of high octane fuel.

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High-octane fuel costs a few cents more per gallon than conventional petrol. You will observe that the change accumulates to a large sum while looking to fill your car. 

What if you have to use high-octane gas because your car requires it? In such a case, you're in big trouble. Besides vehicles used for business, prices are continually rising and becoming harder to keep up with.

Damaging to the environment

The octane value of gasoline does not represent the energy it contains. The figure, on the other hand, solely shows how well gas can withstand premature detonation in an engine. The spark plugs are responsible for igniting the mixture of air and fuel pumped into an engine's cylinders. But occasionally, the air-fuel mixture doesn't work together and starts to burn on its own. 

In the worst-case scenario, this causes intense rattling that can rip up your car's interior in weeks. Use a higher-octane, slower-burning gas to get rid of that engine knock.

During the carburetor's heyday, engine knock was a significant issue. However, it's becoming increasingly uncommon since fuel injectors became the norm in the 1980s. A specified grade of gasoline, usually the cheapest 87-octane "regular," is what fuel-injection engines are typically made to handle.

There's a fair likelihood that the car wasn't designed to handle high-octane fuel if you've been using it and your tailpipe exhaust smells sulfurous.


According to recent research by the American Automobile Association, using higher-octane fuel will have no impact on pollution or emissions. Less than 20% of the vehicles on the road today have engines made expressly to use premium gas, which is what they need to do. According to the AAA, "premium gasoline did not result in higher horsepower, better fuel economy, or fewer tailpipe emissions for other vehicles."

The manufacturers and sellers of premium gas appear to be the largest winners in this situation. The AAA also calculated that motorists spent $2.1 billion last year filling up cars that didn't need premium gas since it couldn't boost engine performance. This was based on a survey of national refueling habits.

However, it does not follow that this makes all gasoline the same. According to research by the AAA, gasoline engines with fewer detergents may build up carbon deposits 19 times more frequently than those using more detergents. 

Low-detergent gas might therefore result in increased emissions and decreased fuel efficiency. Even while the cleaner fuels typically only cost three cents more per gallon than the dirtier ones, sadly, almost half of us purchase petrol that does not include enough detergent to minimize the filth.


Depending on your engine, you may need to use high-octane fuel. However, the majority of normal engines need not. Nevertheless, it's significant to remember that an engine's octane rating can alter over time. An engine's combustion chamber fills up with deposits more and more as it ages.

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