Also here is a simple easy way to check ethanol (alcohol) present and its percentage.
Using a 250ml container fill will 50 ml of water and 200 ml fuel.
Cap and shake to mix water with the fuel.
Set aside and wait a few minutes.
Now if ethanol is present you would get a reading of over 50ml of water at the down of the container.
Divide this overage reading by 200 to get percentage of ethanol. Be done in 125 ml container but the 250ml makes readings easier since everything is doubled.
Example: reading of 70ml minus the original 50ml water equal net reading of 20ml of ethanol which is 0.10 or 10 percent.
As Grumpy said ethanol attract moisture from the air quite easily. I have seen clear fuel become cloudy with a within a minutes on high humidity days if left open to air.
Btw the way our here in the was yellow at first when unleaded was introduced it look like lemonade. Now it much paler in color. As far as I know there was no change in the dying system here in the US.
