Hi George,
I use washing up liquid (the term used for the liquid used here in the U.K when washing dishes by hand, as opposed to putting them in a dishwasher). The brand I use is Fairy... but I don't suppose it matters. I originally used green couloured Fairy liquid but this seemed to throw a noticeable amount of green deposit. I have changed to a lemon coloured version and this doesn't show the same effect.

I find that the mix produces a lot of foam when it comes to the boil and the heat has to be reduced very quickly in order to control it. A pan big enough to prevent the oil foaming out is also advisable. I leave the heat at a level where the contents will stay in the pan and gently stir, stirring should be done right from the start when first heating the mix and continued throughout.

Once the foam subsides and there is not much being produced I turn the heat down to give a low simmer and let it simmer away until the foam dissapears. Leave it to cool and then put in a glass container - usually the empty olive oil bottle !

I also find that there is a brown deposit on the bottom of the pan and I leave this behind when pouring out the cooled oil.

I have had mixes of modified olive oil which were a bit cloudy, they worked fine and after being left for quite some time they did clear.

I have never tried washing it or using anything but the washing up liquid I mentioned. I think you will find that your modified olive oil will work O.K.

I think the only drawback to olive oil is the fact that it degrades reasonably quickly. A batch of 500ml will make several fuel mixes so it is not worth making large quantities at once. I would hope to use any olive oil I modify within a year of making it.I am using some that I made about September last year.

If the rain and wind ease up I will get some more flying in as well...

Reg