Tips Sahabat

Here are the Side Effects of Using High Octane Fuel for Your Car Friends

10 April 2025
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Having a vehicle like a car cannot simply choose fuel or only high-octane fuel. This is because fuel has different octane levels, commonly referred to as Research Octane Number (RON). The side effects of using high-octane fuel can trigger engine damage.

Basically, every car is designed with a recommendation for suitable fuel. However, many still use fuel with an octane level higher than recommended because it is considered to provide better engine performance. So, is it true that higher octane increases the car's performance?

Side Effects of Using High-Octane Fuel

In addition to having many advantages, the side effects of using high-octane fuel can also occur. Especially if your car is not recommended to use high-octane fuel as its fuel.

In chemical formulas, octane is the ratio between iso-octane and heptane. These two substances become the standard used in a scale where heptane is valued at 0 and iso-octane is valued at 100. For example, if the mixture consists of 20% heptane and 80% iso-octane, then the octane value of the fuel is 80.

If you use fuel with a low octane level below the recommendation, there is a risk of combustion issues, fuel wastage, and a decrease in engine power. 

But what will happen if the car uses fuel with a higher octane value? 

For example, the highest octane fuel is 100, Pertamax Racing sold at Pertamina. Below Pertamax Racing is Pertamax Turbo with an octane of 98.

The side effects of using high-octane fuel include the presence of combustion residues caused by incomplete combustion. These residues will become black soot that then forms carbon deposits in the combustion chamber.

The unburned fuel can enter the engine, even mixing with oil. Of course, such conditions are very dangerous for engine components. 

Not only that, the side effects of using high-octane fuel can trigger valve leaks. It can also cause pre-ignition due to components that are not present in the piston. This term is called detonation.

There is another term called Lean Burn Engine, or dry combustion, also caused by the side effects of using high-octane fuel.

Therefore, it is important to use fuel according to the manufacturer's recommendations so that the car's engine does not easily get damaged. Just like not forcing the use of Pertamax Turbo for cars that should use low-octane fuel.

To work more optimally, the car engine needs fuel that matches its specifications. The higher the octane value, the more resistant the engine is to compression and harder to ignite.

Thus, you can use the engine's compression as a benchmark in determining the appropriate fuel for its performance. The adjustment of the ratio between compression and octane value is as follows:

  1. Compression ratio 7-8:1 using fuel with octane 87
  2. Compression ratio 8-10:1 using fuel with octane 91
  3. Compression ratio 10-11:1 using fuel with octane 98
  4. Compression ratio 11-12:1 using fuel with octane 100

Well, those are the various side effects of using high-octane fuel that is not suitable for the type of vehicle. You can buy a Daihatsu car with the best quality and more fuel-efficient.

And always pay attention to the effects of using high-octane fuel on your vehicle and its impact on the environment. Hope this is useful!

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