Immediately Stop Using Regular Petrol If You Are Using These Cars: Shocking Details Revealed!

Published: Monday, March 24, 2025, 11:00 [IST]

In the realm of petrol engines, the octane rating is a crucial factor that influences an engine's performance and efficiency. The higher the octane number, the more resistant the fuel is to knocking or uncontrolled combustion, which is particularly beneficial for high-compression engines.

High Octane Petrol Brands In India

Indian Oil's XP95 and XP100, along with Bharat Petroleum's Speed 97 and Hindustan Petrol's Power99, are among the high-octane fuels available in India, designed to meet the needs of modern gasoline direct injection (GDI) engines and high-performance vehicles.

Cars That Benefit From High Octane Petrol

For engines specifically designed to take advantage of high-octane fuels, such as the VW Group's TSI engines, Hyundai's 1.0-litre GDI, Tata Motors' 1.2 GDI, and various luxury cars, using fuel with a minimum of 95 RON can significantly improve power and efficiency.

These engines are equipped with the necessary ECU programming to adjust ignition timing when using fuels with an octane rating above 95, resulting in a 3-5 percent improvement in both power output and fuel economy compared to using standard 91 RON petrol.

Understanding Octane Ratings & Their Impact on Engine Performance

The octane number, also known as RON (Research Octane Number), denotes a fuel's capability to withstand premature combustion, also known as knocking. Engines with higher compression ratios, such as those found in many modern vehicles, demand fuels with higher octane ratings to operate efficiently.

While most mass-market cars with naturally aspirated engines are tuned to run on the standard 91 octane fuel commonly available in India, the advent of gasoline direct injection engines has shifted some focus towards higher octane fuels.

DriveSpark Thinks

While the general populous of vehicles on the road are calibrated for 91 octane petrol, modern GDI engines, such as those from VW Group, Hyundai, Tata Motors, and several luxury brands, show notable improvements in performance and efficiency with 95 RON or higher fuels.

This advantage stems from their design, which includes ECU programming that adjusts ignition timing to optimize performance when using high-octane fuel. Therefore, for vehicles equipped with such engines, filling up with 95-octane petrol, even without ECU reprogramming, can offer tangible benefits.