Today's test mix on my old Irvine .40 was:
62% denatured ethanol from builders warehouse
20% gasoline
15% castor
3% acetone

Idled happily at medium idle (without glow batt) screamed at full throttle but the throttle response is extremely sluggish (suggestions anyone?)

When I have finished testing and improving my Ethanol fuel mix I will post my recipe and findings on a separate thread.
I want to get the very old Irvine .40 running reliably first and then try different engines. This particular .40 has bad compression and always was a real pig.


Meanwhile if anyone can suggest a widely available oil instead of castor, I'll give it a try (if I can find it!)