A friend gave me an old but unopened gallon of ATF, type DexronIII/Mercon. I've read that ATF + Acetone makes excellent penetrant. Is this the right stuff, and is it worthwhile to make up a small batch? Proportions?
While I'm at it, is this ATF similar enough to the UTF in my backhoe that I can use it as make-up, or perhaps as a flush? Anybody know?
I see this is an old post but I ran across it and saw that you didn't get an answer so I thought you might still be interested in a recipe for a penetrating oil using ATF as a base.
I have used versions of this for many years and it works quite well but it is kind of nasty and extremely flammable so be very careful using it! This stuff is commonly called Ed's Red and was invented by a fellow that was a gunsmith as I understand. The recipe is as below.
1 part ATF. Dexron II, IIe, III ( any of these can be used)
1part Aliphatic mineral spirits ( this is also known as Stoddard solvent or Varsol).
1part K-1kerosene.
1 part acetone.
Mix outdoors in a well ventilated area. This mix should also be used in a well ventilated area!
I have a metal pan that will hold just over a gallon. I pour the ATF in and use the empty bottle to add the other ingredients. Stir it up well and drain into a clean, metal gallon can. You can then transfer some into a pump oil can for use. Cap the metal can tightly as the acetone will evaporate quite quickly.
Some plastic cans can be used but other plastic cans will be attacked by the acetone and eventually eat holes in the plastic so I use only metal cans.
You can find other formulas for this concoction on the internet by googling Ed's Red formulas. Many YouTube videos exist as well.
Ed's Red is also an excellent bore cleaner for black powder guns and was originally made by this Ed fellow for that purpose. I have not used it myself as I don't shoot black powder weapons.
I hope you find this useful.