This is a 50/50 mix of ATF and acetone. Shake it up, and it separates as shown in about a minute. ATF on the bottom, acetone on top.
I read a bunch of "freeing up stuck motor" posts, and this is very popular, poured into the spark plug hole, but what's the point? If the ATF is just going to settle on the bottom, and the acetone is going to be on top, where it won't reach the stuck piston, why not skip the acetone? Am I doing something wrong????