<div style="text-align: justify">You're absolutely right about the possibility of underestimatimng the ignitor fraction, Lou. However, the brew that I mentioned in my original post hasa theoretical ether content of 30% (allowing for the heptane fraction) which isn't excessive, especially if yourun a fair number of small diesels as I do. I'd rather have a little too much ether than too little.Anyway, that brew works very well indeed - I'm happy!

I also agree with youabout the low ether content starting fluids. They really don't work well at all - the compression requirements are pretty startling! I think you need a fluid with an ether contentof over 50% to keep the compression under control.In Canada, only Gunk Liquid Fire and (apparently) Kleen-flo meet this criterion. I also think that you do have to make some allowance for the heptane, naphtha or whatever. As you say, how much is the question ................

I found an earlier thread in this forum which discussed Amsoil cetane boostadditive in some detail., One guy tried 10% and reported very low compression settings and very smooth running. But I think that's way over the top. A lot of guys seem to use 2 1/2 %. I actually don't see a problem with 3%, but am I missing something here?

Still waiting for one of our Canadian colleagues to tellme if JD starting fluid is available in Canada! Meanwhile, I'll use Kleen-flo for Drone fixed compression fuel. I just tried a first model Drone (plain bearing) on the same stuff withequally good results. </div>