Penetrating Oil Information

19Fordy

19Fordy

Well-known member
I found this info from Machinist's Workshop Magazine which shows the mix of
50/50 automatic transmission fluid and acetone is the best penetrating fluid to use.
It worked better than any commercial product they used on a "rusty bolt test". The torque readings really reveal a big difference. I know many Fordbarner's alreadyuse the 50/50 mix but, it was interesting to see test results.
 

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You have to be a little more careful using 50/50 because the acetone wants to evaporate immediately, so you gotta mix/shake it right before use and keep it tightly sealed.
 
19Fordy said:
I found this info from Machinist's Workshop Magazine which shows the mix of
50/50 automatic transmission fluid and acetone is the best penetrating fluid to use.
It worked better than any commercial product they used on a "rusty bolt test". The torque readings really reveal a big difference. I know many Fordbarner's alreadyuse the 50/50 mix but, it was interesting to see test results.
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I have seen the home brew 50-50 mix recommended many times, but was always skeptical that it would actually be better than known commercial products. When was that test done? How old is that magazine article?
 
JayChicago said:
I have seen the home brew 50-50 mix recommended many times, but was always skeptical that it would actually be better than known commercial products. When was that test done? How old is that magazine article?
Click to expand...

The reason our economy is strong: The American public is conditioned to believe that highly advertised products at inflated prices must surely be better than can be made inexpensively at home.
 
I thought I saw a similar test on YouTube a few years ago that put the Acetone/ATF in the middle of the pack.

I'm too old to go look for it.:o
 
tubman said:
I thought I saw a similar test on YouTube a few years ago that put the Acetone/ATF in the middle of the pack.

I'm too old to go look for it.:o
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In 2018, Project Farm ran a set of tests and ranked 50/50 #2, with Liquid Wrench #1. For seized fasteners, heating is superior to all oils.
 
alexiskai said:
In 2018, Project Farm ran a set of tests and ranked 50/50 #2, with Liquid Wrench #1. For seized fasteners, heating is superior to all oils.
Click to expand...

Agree on heat when you can get to it. I've had great luck using a product Free All. It was recommended to me from a busy diesel mechanic. He said he's tried them all.
 
alexiskai said:
You have to be a little more careful using 50/50 because the acetone wants to evaporate immediately, so you gotta mix/shake it right before use and keep it tightly sealed.
Click to expand...




The secret is to only use mineral ATF, not synthetic. The acetone will not go into the synthetic and separates out quickly and thus can evolve. If you use mineral ATF it fully goes into solution and does not have those issues.
 
Is Free-All the one that smells good? Got some of it somewhere, seemed real good.

Has ANYbody ANYwhere ever seen any of that stuff work it's way down to the threads of a really rusted bolt?
 
I don't know about Free-All, but Marvel Mystery Oil smells so good that I use it in both my gas and oil.:)
 
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3 ounces of Marvel Mystery Oil in the washer with your work clothes imparts that most elusive aroma of Master Mechanic. A side benefit: You’ll have no further need for deodorant or skin moisturizer.
 
I agree with Cecil/WV. I've been using Kroil for years along with an application of a little
acetylene heat and it has never failed me. If something is heavily rusted, wait a day or two
before attempting to loosen.

Peter
 
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