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Old December 10, 2012, 06:24 PM   #1
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best penetrating oils

This story came to me from one of the guy's in the EAA club Interesting !!

Subject: Fwd: Penetrating Oils
"Machinist's Workshop" recently published information on various penetrating oils. The magazine reports they tested these products for "break out "torque" on rusted nuts and bolts. A subjective test was made of popular penetrating oils, with the unit of merit being the torque required to remove the nut from a "scientifically rusted" bolt.
Average torque load to loosen nut:

No Oil used ........................516 foot pounds
WD-40 ..................... ........238 foot pounds
PB Blaster .........................214 foot pounds
Liquid Wrench ......................127 foot pounds
Kano Kroil .........................106 foot pounds
ATF/Acetone mix..................... 53 foot pounds

The ATF/Acetone mix is a "home brew" mix of 50/50 automatic transmission fluid and acetone. Note this "home brew" released bolts better than any commercial product in this one particular test.
Our local machinist group mixed up a batch, and we all now use it with equally good results. Note also that Liquid Wrench is almost as good as Kroil for 20% of the price.
ATF/Acetone mix is best, but you can also use ATF and lacquer thinner in a 50/50 mix. ATF = Any type of Automatic Transmission Fluid
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Old December 10, 2012, 08:28 PM   #2
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I've always used Kroil. The price never bothered me because it always works and I really don't go through alot of it.
Joe C
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Old December 10, 2012, 08:58 PM   #3
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I've had a can of Kroil on my bench forever !
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Old December 10, 2012, 10:33 PM   #4
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I've used straight ATF with good results, I'll have to try it mixed with Acetone.

Best Regards
Bob Hunter
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Old December 11, 2012, 01:14 AM   #5
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Having been formerly in the business of breaking loose some rather large nuts on heavy and farm equipment, I've tried all of the above. IMO, nothing worked as consistently well as Kroil. The ATF mixtures would sometimes work well, other times not.
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Old December 11, 2012, 04:27 PM   #6
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Brothers I have seen the light, its called State PEN, and it made in Canada, its really bad--s!!! If you can find it try it.
It actually seems to turn rust into graphite, for lack of better compare.
Thanks for coming!

Last edited by hooligan1; December 11, 2012 at 04:38 PM.
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