Fuel question

[POW]

Why fuel company say their e10 have minimum 93-94 octane level? Is it true and why not reflect in the fuel consumption? Does e10 bad for your car (non premium)? Just want to have some idea.

[hooba]

A1. Because it has 93-94 octane.
A2. Fuel consumption has nothing to do with octane.
A3. Google is your friend. Ethanol fuel - Wikipedia, the free encyclopedia

[Diesel_vert]

Why fuel company say their e10 have minimum 93-94 octane level? Is it true?

Yes.

1. Regular unleaded: 91 RON.
2. E100 (i.e. 100% ethanol): varies from 109 to 129 RON depending on who you quote.
3. Regular unleaded E10: varies from 93, to less than 95, due to 10% ethanol content.
4. Market price of ethanol is simply less than petrol.

Conclusion: E10 costs less despite having a higher RON.

... why not reflect in the fuel consumption?

Research Octane Number (RON) is a measure of a fuel's resistance to knocking.

Basically, the more you can compress the fuel before igniting it, the more efficiently it burns, but only up to a certain limit before it starts to ignite by itself (potential engine damage!). The octane rating of a fuel is what determines this limit.

Whether that leads to more power or less fuel consumption depends on your engine being able to recognise and take advantage of higher octane fuels.

Does e10 bad for your car (non premium)?

Regular unleaded E10 has a RON of less than 95, so you cannot use it in any vehicle that specifies a minimum RON of 95, otherwise there is a risk of engine damage.

[Dyldo]

Whether that leads to more power or less fuel consumption depends on your engine being able to recognise and take advantage of higher octane fuels.

Very accurate! basically octane and the potential energy to be released from each atom of fuel have NOTHING to do with each other. Its why you go further on a tank of 91 than you do on e10 - even though e10 has a higher RON value.

Don't get me started on US RON vs rest-of-world RON vs MON

RON values are like wang sizes - bigger isn't better, its all about the bang. Quote me on that one too

[hooba]

RON values are like wang sizes - bigger isn't better, its all about the bang.

As requested!

Love your work.