Honda_CBF

Guys I have been reading & hearing about marginal uses of ethanol with petrol (5% to 10%). Which helps in cleaner burning of fuel & cleaner engine.
But what about performance, FE, any other side effects on engine..
Wanna learn the merits & demerits of it.. Wasn't able to find good answers on internet so started this thread.
Plz guide me..

Noor

Query approved

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sinnerz2000

I've heard of this too, i guess ur supposed to add 10ml per litre of fuel for efficient combustion of fuel, its supposed to noticeably increase the acceleration nd top end of the bike. Too much ethanol causes tiny explosions in the bore causing piston holes. Never tried it so far though.

Honda_CBF

10ml per litre is only 1%.. Most car & bike manuals says it can be used in the range of 5% to 10%, which is 50ml to 100ml!! Is it too much??
@ Noor,
thanks for quick approval mate!

psr

Ethanol is a fuel with higher RON and so helps in preventing pre-ignition.It is a clean burning fuel with water as one of the end product .This means the exhaust,valves etc., are likely to rust much more than normal.The combustion efficiency of ethanol is lower than petrol,and so needs more ethanol to reach same distance compared to petrol...

Mechanics see ethanol damaging small engines - Business - Consumer news - msnbc.com

What are the Advantages and Disadvantages of Ethanol Fuel?

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aargee

Brilliant Sir, as always

So Ji, what're the other options to mix with 91 RON fuel, IF, ethanol cannot be mixed? Do I've my own choice to make a 97 RON at lesser price than the regular 97 RON (Speed 97)?

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psr

Yes but it is risky..I normally use Pure Acetone at 1.5ml per liter of petrol to get smooth engine performance..Sometimes I get better FE though not consistent.Here is a link to a DIY octane booster..like the content says "Do it at your own Risk ".
DIY Octane Booster

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plasmabhai

I also used pure acetone at around 4-5 ml per L of petrol. I thought I used to get higher fuel efficiency figures of an almost 5kmpl increase. However after adding acetone consistently over a 5 month period, my personal experience has been that the increase in fuel efficiency was just down to my riding style and my own confirmation bias. Even I felt that the engine ran smoother after adding acetone but then again when i replaced my air filter and engine oil the engine was just as smooth and gave the better mileage without any acetone. So i have concluded that acetone indeed doesn't help much and might in fact dissolve something on its way to combustion and so have stopped using it.
I used to use the Analytical Grade Acetone which is 99.99% pure and the cleanest acetone available in the market (not the impure nail polish remover types). Used to take 10-15 mls of it from my bottle in the chemistry lab

psr

Using Acetone I found that the combustion chamber deposits were minimal ,evident from periodic checking of spark plug ,running with and without Acetone..and always with Acetone the engine was smooth,and at times when i accelerated at a higher gear from lower RPM found the engine to fire without 'pinging"..ie, pre-ignition.

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kb100

i can agree to that , but acetone is expensive (205/.5lit)

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