In article ,
wrote:

I read that article and have seen it quoted many times. A few years ago I mixed up some in a small pinpoint
squeeze bottle and found that ATF doesn't really mix with acetone, at least the ATF I used (don't remember if it
was Dextron, Mercon, or something else). I did not use the mixture and certainly did no instrumented tests but
it seems that getting them into a suspension is problematic. Shaking furiously to mix them seemed to make a pink
goo.

I did some experimentation over the last couple of weeks with various
oils plus acetone (based on a friend's recommendation of the
ATF+acetone mixture). I didn't have any ATF sitting around, so I
tried using chainsaw bar oil as a poor substitute.

Chain-bar oil and acetone do not mix at all well. The oil tended to
sit on the bottom of the jar, or break up into discrete drops.

On a hunch, I added a capful of odorless mineral spirits.

Shazam! The lumpy suspension dissolved into a nice consistent
pink-colored liquid which flowed very nicely. I used up the last of
it on Sunday, as a cutting fluid while flattening the bottom of an old
plane I had de-rusted.

Apparently, mineral spirits is miscible in both heavy oil and acetone,
and makes them more compatible with one another. A similar trick
might work with an ATF+acetone mixture.