First, fill the Fuel Check Tube with water to the indicated line. I used the 5.0ml syringe for this. It squirted a bit, so I used a screwed-up sheet of paper kitchen roll to carefully remove the water droplets that were on the side of the tube. I'm not sure just how accurate the kit actually is but I figured that I should be as accurate as possible.
![P1030928.jpg](./download/file.php?id=437&sid=0d0bd8e3a297837e27471cf854cf1c7e)
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Okay, I was slightly low.
Next, add the petrol/gasoline to its indicated line:
![P1030931.jpg](./download/file.php?id=438&sid=0d0bd8e3a297837e27471cf854cf1c7e)
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Bit low again.
Next add two or three drops of the dye (I used two here). No photo at this stage, because the dye sank to the bottom.
Now place the stopper in the Check Tube and shake. The instructions say for 10 seconds, but I must have done it for at least twice that.
The Check Tube was then placed on the work surface and left for 1 to 2 minutes, as per the instructions. It must have been more like five minutes or more by the time I took this photo:
![P1030934.jpg](./download/file.php?id=439&sid=0d0bd8e3a297837e27471cf854cf1c7e)
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You can tell that this is the test result, because the water is now dyed blue. (Using a purple background was probably not the best choice
![Sad :(](./images/smilies/sad.gif)
.)
Note that the water level is exactly the same!!! (And the meniscus has disappeared in the presence of fuel rather than air.)
So what does this mean?
BP Ultimate from my local BP outlet contains NO ETHANOL
Had there been any ethanol in the fuel, it would have been separated out and absorbed by the water, hence the final level of the water would have been higher.