Franglais:
Wheel Nut:
That already happens with Unleaded fuel, it gets gummy and blocks float chambers and jets up, my mate makes a living from lawnmowers after winter layup.
Aren`t the gums from component compounds in the petrol?
So, leaded or not, with ethanol or not, they will always be there in approx the same amount?
I see your point but think the unleaded seem to go stale quicker than leaded, maybe it is because modern engines are more temperamental, an old tractor would run on a petrol paraffin mix, with a modern vehicle the Engine Management Light will be glowing like an ABS fault at the test station!
Wheel Nut:
We were successfully racing in grasstrack and speedway and the fuel used is Methanol, however it is hygroscopic and its advisable to drain the tank after each race, Ethanol is also hygroscopic in lesser measure but I would make sure it wasn’t stood for months.
The downside of Ethanol is that it is not as energy efficient as Petroleum Spirit so you may get lower MPG figures and as Diesel and Petrol are now the same price, if you have a diesel car, look after it, keep it. 
Surely being Hygroscopic isn’t a problem - if you put the airtight fuel cap back on after re-fuelling, as you do…?
Winseer:
Wheel Nut:
We were successfully racing in grasstrack and speedway and the fuel used is Methanol, however it is hygroscopic and its advisable to drain the tank after each race, Ethanol is also hygroscopic in lesser measure but I would make sure it wasn’t stood for months.
The downside of Ethanol is that it is not as energy efficient as Petroleum Spirit so you may get lower MPG figures and as Diesel and Petrol are now the same price, if you have a diesel car, look after it, keep it.
Surely being Hygroscopic isn’t a problem - if you put the airtight fuel cap back on after re-fuelling, as you do…?
If your fuel cap was airtight it would create a vacuum and it wouldn’t even get to the tapes. The tank has to be vented to feed the carb, these engines only do about 3mpg and need all the fuel they can get.
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There is some Brouhaha going on regards car insurance & this E10 petrol!, For my old Rover 75 the Government site says
"No compatibility information for Rover cars is available as the manufacturer no longer trades. It is therefore not recommended to use E10 petrol.
I spoke to my insurance broker who stated that it is advisable to follow government advice and if the government advice is that E10 is not recommended, To then use E10 fuel would be comparable to filling with the incorrect fuel such as putting diesel in a petrol vehicle and if such a claim was raised that could then result in your insurance being void. 
I wonder how many other Marques of older cars will be affected?
Funny how this new petrol isn’t really being made public and advertised etc. Seems.to be sneaking upon us really.
And I know someone they have an old citeron 2000 goes ok nothing wrong with it.
Website only says only 1 make of citeron isn’ts compatible.with it.
Yet keep hearing any veichels over 10 years old won’t accept so who do you believe.
It’s being forced on is under the radar in my opnion