Difference Between Normal and High Octane Petrol - We Explain

Whenever we reach a petrol pump or gas station in India, the pump attendant (bhaiya) always asks us, "Normal wala ya Power?" He is referring to high-octane petrol, which is Rs 5 to Rs 6 more expensive than normal petrol, usually 91 Octane. Checking the price difference, 95% of car buyers switch to the regular one and never even think about the actual benefit of high-octane fuels. However, it has become imperative to understand, as turbocharged petrol engines are now available in almost every modern car, and they perform better with the expensive petrol. So, follow me as I explain the difference between these two types of petrol available in India. For more information like this, do follow the 91Wheels Whatsapp Channel to never miss out on automotive updates.

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Normal Petrol vs High Octane Petrol

In India, where naturally aspirated petrol engines are the base in almost every mass-marketer car, filling up with a regular petrol makes more sense, as they engineered in way that they can are still reliable to work on fuel - that is isn't the purest in its form, and still doesn't create any trouble. Also, now the governments are even adding 20% ethanol, which is developed by fermenting, sugarcane, corn and several other biomass products. As per the goverment, this step is taken to gradually loose dependency on the fossil fuels, which is heavily imported in India.

Now, the second one with high octane has a better combustion process and is resistant to knocking, which in simple words means the fuel is burning in the right and controlled way. Moreover, these are required in cars with turbo petrol engines, as they have to work a lot, because the exhaust gases are re-entered into the engine through a turbocharger. To add more, it isn't absolutely compulsory to only add high-octane petrol in turbocharged cars, but when you put that oil, the fuel efficiency and overall performance improve by almost 3% to 5%.

In India, we get XP95 and XP100 from Indian Oil, Speed 97 from Bharat Petroleum, and Power 99 from Hindustan Petroleum.

Criteria	High Octane	Normal Petrol
Octane Rating	95 to 100	89 to 91
Price	Rs 100 Plus	Rs 94.77 (In Delhi)
Engine Additive	Contains cleaning additives	No additives
Mileage	Marginally better for performance oriented cars	Standard mileage
Engine Performance	Slight improvement in performance cars, fuel burn more efficiently	Regular performance
Emission Levels	Lower due to additives	Regular emissions
Recommended For	Turbo charged engines, and performance oriented cars and bikes	Naturally aspirated petrol engines

Why The High Octane Is Recommended?

Simply, because they are a purer form of petrol, which your engine likes more. The newer cars, although compliant with the latest government emission norms, support any fuels that have other mixes like ethanol and other substances. But the plain basic reason why you should also choose this is that, in everyday driving, the difference is clearly felt.

The engine response becomes better, the refinement is visible from the first go, and even fuel efficiency goes up. Overall, the life of your engine will improve, which also results in lower maintenance costs in the long term. Several premium car manufacturers straight away notify their customers to only use high-octane fuel, as for larger engines with more cylinders and cubic capacity, only the purest fuel can create a difference. Lastly, mass-market brands like Volkswagen also recommend the usage of high-octane fuel, even in their entry-level cars, as they're engineered in that manner.

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