WD-40 (again) was Re: A fruitfull evening

[Chuck Guzis]

Okay, I'll chime in here.

In my experience petroleum oil and acetone are not miscible.   Water and
alcohol (and gasoline) will mix with acetone, however.

So what's the lowdown on the ATF-acetone mixture?

http://www.instructables.com/id/Home-made-penetrating-oil/

States pretty clearly that the mix will separate, so you have to keep
shaking the bottle.  Perhaps it could be made to emulsify somehow (add a
surfactant?)

Personally, I'd substitute paint thinner or kerosene for the acetone.  I
suspect it will work just as well--and it'd mix with the ATF.

--Chuck