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E20 vs E25 vs E85 vs E100: Promoting ethanol blending in petrol aims to ensure a cleaner environment and reduce dependence on crude oil imports. Currently, E20 petrol is a major topic of discussion. Various claims and rumors circulating on social media have raised questions among vehicle owners regarding their safety and impact. However, the government dismisses these claims as misleading, asserting that E20 petrol is produced in accordance with established standards and is compatible with vehicles. Let us understand the differences between these fuel types in this article.

What is E20?

The ‘E’ in the names of these fuels stands for ethanol, while the accompanying number indicates the ethanol content. E20 consists of 20% ethanol and 80% petrol. This blend is being adopted on a large scale across the country. Vehicles certified as E20-compatible can safely use this fuel without requiring any modifications.

What is E25?

E25 contains 25% ethanol and 75% petrol. The government is currently developing this blend based on vehicle compatibility requirements.

What is E85?

E85 comprises 85% ethanol and 15% petrol. It is designed specifically for flex-fuel vehicles. These vehicles feature specialized fuel systems, sensors, and engine tuning optimized to operate with higher ethanol concentrations.

What is E100?

E100 is a fuel composed entirely of ethanol. It can only be used in vehicles specifically engineered for it; standard petrol engines are generally not suitable for this fuel. Can these four fuels be used interchangeably?

It is important to note that E20, E25, E85, and E100 cannot be used as substitutes for one another. Vehicle manufacturers determine which fuel is best suited for your car; therefore, you should verify this information before refueling to avoid a potential vehicle breakdown.

Can ethanol damage the engine?

This question is on many people’s minds and is being widely discussed on social media. Experts clarify that the notion of ethanol damaging engines is incorrect. Problems arise only when fuel with an ethanol content exceeding the vehicle’s capacity is used; that is, when damage can occur.

If your vehicle is E20-compatible, using E20 petrol will not harm the engine. Manufacturers have already designed fuel lines, seals, and other critical engine components to handle this blend.

Regarding the use of E25, E85, or E100

Using high-ethanol fuels such as E25, E85, and E100 in standard petrol engines can cause issues. Ethanol combusts differently from petrol, requiring specific engine calibration for these fuels.

What do petroleum dealers say?

Petroleum dealers point out that certain rubber and metal components in older vehicles can deteriorate over time. This can result in fuel system malfunctions, reduced performance, and costly repairs. While no specific incidents have been reported, an ARAI report suggests that using such fuels could reduce mileage by up to 6%, necessitate expensive repairs, and potentially damage parts in older cars. Impact of Ethanol on Mileage

Many vehicle owners believe that fuel with higher ethanol content reduces mileage; the primary reason is ethanol’s lower energy density. Ethanol contains less energy than petrol, so the engine must burn slightly more fuel to generate the same amount of power. However, the difference is usually negligible in vehicles specifically designed for E20 fuel, as their engines are engineered accordingly. In contrast, mileage can drop significantly with E85 and E100 fuels.

What do vehicle manufacturers say?

Automobile companies such as Maruti Suzuki, Mahindra, and Hero MotoCorp state that E20 petrol has been introduced after thorough testing. According to these companies and industry experts, using E20 fuel is appropriate for vehicles designed to be compatible with it.

Guidelines for use

It is advisable to prioritize the vehicle manufacturer’s recommendations when selecting fuel. Vehicle owners should use the specific fuel grade prescribed in the owner’s manual. Doing so ensures optimal engine performance, keeps the fuel system safe, and helps avoid unnecessary expenses in the long run.