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The best Penetrating Oil

Discussion in 'The Hokey Ass Message Board' started by Flathead 34, Dec 6, 2010.

  1. I was reading a copy of Machinists Workshop magazine and they did a comparison test of several products used to loosen stubborn, rusted lock fasters. They arranged a test of all the popular penetrants with the control being the torque required to remove the nut from a bolt in a rusted enviroment. This is what they found.

    Prnetrating oil used Torqe to remove nut
    None 516 pounds
    WD-40 238 pounds
    PB Blaster 214 pounds
    Liquid Wrench 127 pounds
    Kano Krol 106 Pounds
    ATF-Acetone Mix 53 Pounds

    The ATF-Acetone mix as you know is a home brew mixed 50-50.
  2. Wow I've gotta try that ATF-Acetone mix. It blows the others away.Probably be a lot cheaper too.
  3. FC49
    Joined: Oct 11, 2009
    Posts: 324


    I can attest to the ATF/Acetone mix being the best. One caution: I made the mistake of soaking a motorcycle brake cable in the stuff trying to free it up, and the acetone dissolved the vinyl covering. Be careful with it.

    But it does work wonders on rusted parts.

    Frank C.
  4. Eight433
    Joined: Mar 16, 2008
    Posts: 257


    wow! The best I've found has been Sea Foam Deep Creep, but that shit's like 8 bucks a can! I'll have to try the ATF Acetone mix as well! I think you can get a compressed air refillable spray can at horrible freight pretty cheaply to apply it with.
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  5. skiviskaves
    Joined: Aug 3, 2009
    Posts: 247


    Very good info. I'm just starting disassembly of a 1940 car and 1955 motor. I don't think either has ever been apart so I will certainly be trying the ATF-Acetone mix.
    Mr. Bill
  6. kisam
    Joined: Feb 28, 2005
    Posts: 1,916


    The ATF/Acetone stuff really works! I snapped both thermostat housing bolts off into a 28 Chevy head. There was just enough bolt sticking out to weld a washer and a nut on the end. I let it cool for about 10 minutes and then added the AA mix and let it set another 30 minutes - both bolts came right out.
  7. rustydusty
    Joined: Apr 19, 2010
    Posts: 481


    You can't forget good ol' 'Gibbs'. As a collector of antique (pre WW2) outboard motors, I have freed up some seriously stuck engines with 'Gibbs'! I am going to try the acetone-ATF mix though.
  8. Gator
    Joined: Dec 29, 2005
    Posts: 4,009


    Thanks for the useful info!

    Woulda helped last week removing the hinges from my '50 Ford - after soaking them in PB blaster for 3 consecutive days and using an impact driver I ended up drilling them out.

    Eight433, and old fashioned metal oil can might be good too, you cans till find them at your local auto parts store.

    I'll try this next time I have a stuck/rusted bolt.
    Joined: Aug 19, 2002
    Posts: 1,958

    HAMB O'dex Editor
    Staff Member

    i use the atf/acetone mix in the salvage yard. we love the stuff
  10. robleticia
    Joined: Oct 15, 2007
    Posts: 2,499


    I'm gonna try the mix, however "Gibbs" is the SHIT!
  11. big bad john
    Joined: Aug 11, 2010
    Posts: 4,728

    big bad john

    .......Thanks for the thread..........I'll try it on 1937 door posts......hope it saves me a lot of time.....
  12. f1 fred
    Joined: Apr 29, 2005
    Posts: 515

    f1 fred
    from mn

    Alcohol, tobacco, firearms and acetone! That kinda stuff gets me all loosey goosey as well:D

    Great tip I will be trying that for sure!
  13. refried confusion
    Joined: Nov 14, 2010
    Posts: 277

    refried confusion

    Last edited: Dec 5, 2012
  14. 1971BB427
    Joined: Mar 6, 2010
    Posts: 5,463

    from Oregon

    I've used and loved Kroil for years, but sounds like I better try the mix too!
  15. i tried the acetone mix before and didn't get good results maybe i didn't mix it right...
  16. ganga
    Joined: Dec 27, 2008
    Posts: 152


    what are the portions....50/50 ??
  17. fleetbob50
    Joined: May 1, 2006
    Posts: 306

    from Waco,Texas

    i'd second this, hard to believe that atf and acetone would be leaps and bounds better than Kroil, ok cheaper maybe,
  18. CutawayAl
    Joined: Aug 3, 2009
    Posts: 2,145

    from MI

    Long before this info started circulating around the internet I had used oil solvent in a pinch. If the ATF & solvent works in your case than it was goods enough, but don't expect it to outperform the best penetrating oils. If you read the entire article that goes with those results you will see the test wasn't actually done on rusted/frozen bolts.
  19. hellcat666
    Joined: Sep 8, 2005
    Posts: 266


    Wish they had done that test with some zep 45, i find that stuff blows PB and pretty much anythign else outa the water. The can has a mix ball in it ITS GOTA BE GOOD haha. should give the mix a try though
  20. I Drag
    Joined: Apr 11, 2007
    Posts: 884

    I Drag

    I'm with CutawayAl on this...think about this "test" for a second guys:

    How could anyone set up a bunch of fasteners and then "rust" them all to the EXACT same tightness? Since so many factors affect fastener tightness due to corrosion, it would be pretty hard to prove that all the fasteners were the EXACT same tightness before trying to remove them. So how EXACT can the results be?

    I am still going to try A/A mix, just with a little healthy skepticism
  21. Captain Chaos
    Joined: Oct 16, 2009
    Posts: 577

    Captain Chaos
    from Missery

    I had found motorcycle chain oil at Harbor freight by liquid wrench worked great, better than PB , was cheap too but price just went up with new fancy can : (
  22. Best I have found so far, is Seafoams "Deep Creep"
    I also like "LMT" Lawn Mower Tune-up, its like spray Marvel oil.

    I plan to try this ATF mix......
    If it works good enough for Flat-top Bob, Its good enough for me! ;)
  23. shooter54
    Joined: Apr 25, 2006
    Posts: 5,032


    believe it or not, toyota brand penetrating oil is amazing. it works the best of any i've ever seen or tried.
  24. Mazooma1
    Joined: Jun 5, 2007
    Posts: 16,374


  25. das858
    Joined: Jul 28, 2010
    Posts: 416


    Kroil is the best I've ever used, with the price of ATF these days it might not be much difference in price.
  26. Jalopy Jim
    Joined: Aug 3, 2005
    Posts: 1,871

    Jalopy Jim

    I use the mix but the 1st oil can I bought had a rubber hose for the top. the stuff ate the rubber. The second and more expensive can has a metal hose and has lasted over an year.

    And it work great, I also use the Kano stuff which works almost as good.
  27. fab32
    Joined: May 14, 2002
    Posts: 13,994

    Member Emeritus

    After reaching 66 years old I've tried EVERYTHING on the market. when I heard/read about Gibbs Brand my first thought was "another snake oil" product and an expensive one at that. After reading the testimonial on and hearing Cole sing it's praises I thought "can't hurt to try". I'll never use anything else. When the advice and directions are followed I challenge anyone to tell me about something better. BTW, after my first can I bought a case.

  28. 53sled
    Joined: Jul 5, 2005
    Posts: 5,822

    from KCMO

    In my experience, strawberry margaritas result in the best penetration with least effort.

    What? Too soon?
  29. TAYLOR
    Joined: Jan 21, 2007
    Posts: 591

    from DALLAS,GA.

    Zep used to have some that worked good.
  30. robleticia
    Joined: Oct 15, 2007
    Posts: 2,499


    hahahahaha! 53 sled, funny, but very true!

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