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E10 petrol

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Created by Knottedup > 9 months ago, 19 Mar 2016
FormulaNova
WA, 15090 posts
21 Mar 2016 10:25AM
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Knottedup said..


FormulaNova said..



Knottedup said..
Yes I also did the same and maybe it worked, who knows?

But there are a couple of differences.
1. It was Metho not Etho.
I'm not sure if that matters.

2. I never put any more than 500ml = 1/2 Litre
let's say in a 50 litre tank of petrol = 1% not the 10% in E10

While on the topic of crap in petrol.
A tip given to several years ago by a mechanic is never, ever fill up if you see a tanker in a garage.
What has just happened with the deposit of new stock is also a stirring up of the crap on the bottom of the garage tank.





I think Metho is mainly ethanol, with the methylated bit added to stop people drinking it.

I would have dumped whole bottles into the tank, so I am thinking I would have possibly had 2 to 5% of metho in there.

I haven't done any research, but I though the problem with a high % of ethanol was that some rubbers will be destroyed, but otherwise it is fine in the fuel system.

Like most things car related its really hard to relate something like fuel quality back to a problem unless its really obvious like a blockage. I think you would never be able to tell the effect e10 has on your car unless a hose completely falls apart.




One thing I can say for sure is Mentholated spirits is Methanol Alcohol with that bitter additive to try and stop people drinking it.
Metho is toxic to humans and has a different chemical makeup to Ethanol which is the alcohol we drink.



Mentholated? Wow, that's to give you that great menthol flavour

No, I just googled it. Its 5 or 10% methylated alcohol and the rest as ethanol. The methyl alcohol is to stop you drinking it as well as a dye and other additives.

It sounds like they use the methylated alcohol so that if you try and distill it into something to drink, you get the methyl bit too, and thus don't bother.

Knottedup
573 posts
21 Mar 2016 11:09AM
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Apologies, you are correct.
I can remember it like it was yesterday that my high school science teacher told us all exactly what I posted.
The Bastard to actually think we would have drunk the stuff if he had told the truth.
Thinking about it yes we probably would have!

The Bastard, to think of all the fun we missed out on.

elmo
WA, 8879 posts
21 Mar 2016 1:25PM
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lao shi said..
Just had a quick look and unless I have missed something there should be no FAME in E10. It is ethanol so cannot make fatty esters which come from the oils used in the manufacture of Biodiesel. Different stuff.
The solvent properties of the ethanol dissolving residues can be an issue.
Methanol impurities can cause corrosion as can water content.
Also Copper (from www.environment.gov.au/system/files/resources/f83ff2dc-87a7-4cf9-ab24-6c25f2713f9e/files/international-feul-quality-standards.pdf)
The committee’s view is that copper is a very active catalyst for low temperature oxidation of hydrocarbons.
Experimental work has shown that copper concentrations higher than 0.012 mg/kg in commercial gasolines
can significantly increase the rate of gum formation.

And all this relies on you getting what it says on the tin!



G'day Mark,

Yes I stand corrected on FAME and ethanol, thanks for the paper which is now added to my Bio fuels library.

Found the article re ethanol and chemical resistance from one of the papers I have.


2.7 Material Compatibility
2.7.1 Polymers
Ethanol induces the swelling and weakening of rubber components, due to the absorption of fuel into rubber. Once
absorbed into rubber, the oxygen of the alcohol breaks the rubber’s carbon-carbon double bonds. The consequence of
swelling and weakening can be a fuel leak that can endanger car users
[17]. Swelling and component breakdown can all be solved by the use of compatible materials such as highly fluorinated rubbers (Viton®)
[18]. Nylon can also be resistant, but only at low temperature (< 30°C)
[19]. This polymer can consequently be used for intake fuel line, provided the fuel temperature remains low.


2.7.2 Galvanic Corrosion
Galvanic corrosion happens when 2 metals are in contact, generally through a conducting electrolyte. For instance, stainless steel and aluminum can undergo galvanic corrosion when placed side by side.
Typical fuels (with no additives) have an electrical conductivity between 10–8 to 10–6μS/cm.

Ethanol electric conductivity is 1.35 10–3μS/cm.
Moreover, the oxidation of ethanol into acetic acid induces a rapid increase in electrical conductivity (41μS/cm for a 0.1M acetic acid solution).
The presence of acetic acid can consequently enhance galvanic corrosion and chemical attack. The metals recommended for use with ethanol include carbon steel, stainless steel and bronze. Metals such as magnesium, zinc casings, brass and copper are not recommended
[14].The previous paragraph assumes that ethanol is dry ”,which means it contains no water. Yet, as water is miscible in ethanol, ethanol with very high water content has been found in the past (up to 5%vol), with ion concentrations that make it much more aggressive than pure ethanol
[15]. The use of anhydrous ethanol is consequently mandatory to avoid engine corrosion. This is the most important limitation to ethanol development, as far as fuel logistic and storage are concerned.


If your car ain't got the sticker on the fuel lid then don't use it.

Still would only use Biodiesel on someones vehicle whom I loathe



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"E10 petrol" started by Knottedup