Graham,

Re the naphtha. I tried a little and then a lot. Time constraints forced me to just spike regular fuel with a bit and then a bit more. I did this with ether based and non-ether. I know that this dilutes all the other ingredients but this was just a quick test to see if it would start. In no way is it definitive. I'm only speculating, but it could be that with just a bit more compression, we might have had a start. And that higher compression may be just the ticket for improving the idle. My CP design may just have prevented me from getting a good result.

Going up to CT now to check to see if they've got the Amsoil 2 cycle. Good tip. I'm sensing that this, or Cool Power oil, might be that missing, magic ingredient, in this exercise.

For this kind of fun, a graduated cylinder is a must for accuracy.

Looking forward to the Biodiesel test.