View Full Version : The best Penetrating Oil


Flathead 34
12-06-2010, 07:56 AM
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.

themoose
12-06-2010, 08:07 AM
Wow I've gotta try that ATF-Acetone mix. It blows the others away.Probably be a lot cheaper too.

FC49
12-06-2010, 08:11 AM
Wow I've gotta try that ATF-Acetone mix. It blows the others away.Probably be a lot cheaper too.

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.

Eight433
12-06-2010, 08:11 AM
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.

skiviskaves
12-06-2010, 08:14 AM
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.
Thanks!
Mr. Bill

kisam
12-06-2010, 08:34 AM
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.

rustydusty
12-06-2010, 08:38 AM
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.

Gator
12-06-2010, 08:48 AM
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.

FLAT-TOP BOB
12-06-2010, 08:59 AM
i use the atf/acetone mix in the salvage yard. we love the stuff

robleticia
12-06-2010, 09:03 AM
I'm gonna try the mix, however "Gibbs" is the SHIT!

big bad john
12-06-2010, 09:03 AM
.......Thanks for the thread..........I'll try it on 1937 door posts......hope it saves me a lot of time.....

f1 fred
12-06-2010, 09:51 AM
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!

refried confusion
12-06-2010, 09:58 AM
_____

1971BB427
12-06-2010, 10:36 AM
I've used and loved Kroil for years, but sounds like I better try the mix too!

1950coronet600hp
12-06-2010, 10:46 AM
i tried the acetone mix before and didn't get good results maybe i didn't mix it right...

ganga
12-06-2010, 11:03 AM
what are the portions....50/50 ??

fleetbob50
12-06-2010, 11:28 AM
I've used and loved Kroil for years, but sounds like I better try the mix too!

i'd second this, hard to believe that atf and acetone would be leaps and bounds better than Kroil, ok cheaper maybe,

CutawayAl
12-06-2010, 11:50 AM
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.

hellcat666
12-06-2010, 12:02 PM
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

I Drag
12-06-2010, 12:14 PM
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

Captain Chaos
12-06-2010, 12:32 PM
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 : (

ThunderRocket
12-06-2010, 02:38 PM
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! ;)

shooter54
12-06-2010, 02:40 PM
believe it or not, toyota brand penetrating oil is amazing. it works the best of any i've ever seen or tried.

Mazooma1
12-06-2010, 03:12 PM
http://i189.photobucket.com/albums/z72/Mazooma1/81217260.jpg

das858
12-06-2010, 03:13 PM
Kroil is the best I've ever used, with the price of ATF these days it might not be much difference in price.

Jalopy Jim
12-06-2010, 03:14 PM
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.

fab32
12-06-2010, 03:43 PM
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 Roadsters.com 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.

Frank

53sled
12-06-2010, 03:45 PM
In my experience, strawberry margaritas result in the best penetration with least effort.

What? Too soon?

TAYLOR
12-06-2010, 03:46 PM
Zep used to have some that worked good.

robleticia
12-06-2010, 03:47 PM
hahahahaha! 53 sled, funny, but very true!

Homespun91
12-06-2010, 03:51 PM
believe it or not, toyota brand penetrating oil is amazing. it works the best of any i've ever seen or tried.

Yeah, well, Toyota had to develop something decent....since their '70s-'90s trucks had the little problem of serious through-rust within 12 months of purchase, in some cases. :D

jokerjason
12-06-2010, 04:09 PM
Been working at a power plant for 16 years now and we buy Kroil in 55 gallon drums......and use the hell out of it. Seems to work good on just about everything except for some stainless steels. I Need to try the Acetone/atf sometime. JOKER JASON.

dudley32
12-06-2010, 04:43 PM
:eek:warning !!...use in moderation...I tried some of this stuff on some old parts ...and my deck fell off the house...:D:D

CutawayAl
12-06-2010, 05:07 PM
Yeah, well, Toyota had to develop something decent....since their '70s-'90s trucks had the little problem of serious through-rust within 12 months of purchase, in some cases. :DSounds like they copied whatever Ford was doing on their trucks during the early to mid '70s. Or, maybe those Ford trucks were made using the steel from scraped Toyota trucks?:D

briggs&strattonChev
12-06-2010, 05:17 PM
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 Roadsters.com 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.

Frank

I've never used the stuff, but I have heard that it is red and looks and smells very similar to thin ATF. Maybe ATF/Acetone is the Gibbs secret recipe?

And the guys at Gibbs are all shitting their pants every time this subject comes up here? Haha

lothianwilly71
12-06-2010, 05:26 PM
Kano for years but need to try the Acetone my self....

62nova
12-06-2010, 05:30 PM
http://i189.photobucket.com/albums/z72/Mazooma1/81217260.jpg
Will this work as a lube also? Just curious.

shocker998md
12-06-2010, 05:37 PM
another one on the gibbs.

I have also found that marvel mystery oil is awsome for soaking parts, and is decently priced at the gallon. I use it alot with working on old guns that are rusty. Ive also used it to free up stuck rusted nuts and bolts.

no6
12-06-2010, 05:46 PM
hmmmm. might have to try the atf, I was dissapointed in the PB Blaster the other night and it did not work well in my model A hindge pins.

brayrod
12-06-2010, 05:55 PM
This has been covered on numerous other websites with varying results but I find the 50/50 Acetone ATF mix to work good. I split the price of it with a friend so we could both try it and he has had good results too. We are frugal so we put it in empty household cleaner spray bottles. We find it will separate pretty quickly so give the bottle a good shake before spraying and let it set for a few minutes to work.

adjustablejohnsons
12-06-2010, 06:09 PM
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.

These figures don't mean much unless they had controls to ensure that each nut/bolt was stuck equally. I guess they could have torqued them all to the same amount and left them all in the same oxidizing environment for a specified period of time. I'm an engineer....can't help it.

big creep
12-06-2010, 06:15 PM
yea we get in there deep baby!:p " thats what she said!"

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.

Second Amendment
12-06-2010, 06:22 PM
All though technically not an oil KY works pretty damn good.

CutawayAl
12-06-2010, 06:35 PM
These figures don't mean much unless they had controls to ensure that each nut/bolt was stuck equally. I guess they could have torqued them all to the same amount and left them all in the same oxidizing environment for a specified period of time. I'm an engineer....can't help it.The entire deal is posted on a website. The write-up is pretty detailed. A link was posted on another forum I visit. I read it it then didn't bother saving it. As I remember all the fasteners were tightened the same amount, then the torque required to unscrew them was recorded. No surprise, the test proves is that ATF isthe best lubricant in the bunch. Problem is, lubricating isn't the same thing as attacking rust and corrosion. I think Kroil is on the acidic side, which probably has a lot to do with it working so well.