- TL;DR Summary
- used/old transmission fluid as another useful one; penetrating oil
Can a used/old transmission fluid be as a penetrating oil constituent along with acetone 100%, common lubricating oil or grease, etc ?
I have seen recipes for making penetrating oil from a transmission fluid by adding acetone. The problem is that it will depend on the type of transmission fluid you have, and how well it mixes with acetone. I have never had any luck blending my own, and there will never be a huge demand for penetrating oil.
I dispose of clean used transmission fluid by adding it to furnace or diesel fuel.