I use Parts Master’s DEX / MERC ATF, along with some acetone, 50/50. Here’s a sample which I shooked the bottle a couple hours ago. Never had a problem with it separating. Of course if you happen to have a can of Pentron hiding up in your auto cabinet.......
Attachments
IMG_0291.jpeg (140.77 KB, 65 downloads)

Craig

My '50 Chevy 3100 5 window, '62-235cu, 3:55 rear
My truck ....... Respect The Rust
If I'm not working on my truck, '65 m00stang or VW camper, I'm fishing with the wife or smoking Salmon.