Recent Topics
Rotella 10W40
by jakewells
5 minutes 51 seconds ago
Extend WiFi Range at the Laptop?
by clarkflower
9 minutes 6 seconds ago
Silicone containing waxes
by mjoekingz28
Today at 09:44 AM
Matrix totaled
by circuitsmith
Today at 08:32 AM
Door rust problems
by Dave Sherman
Today at 07:51 AM
2016 Honda Civic problems
by dbias
Today at 07:39 AM
Royal purple 75-140 in a subaru rear
by 91camarosRS
Today at 07:32 AM
OCI. With short trips. Nissan 4 liter
by Gawardawg
Today at 06:52 AM
Approach Watching on the Beach @ St Maarten ...
by LoneRanger
Today at 06:41 AM
Honda Accord Needs Shocks; Front, Back, or Both?
by tc1446
Today at 05:50 AM
How much oil does your oil filter hold?
by Snagglefoot
Today at 05:44 AM
better day
by mx5miata
Today at 05:26 AM
BRAVO to Officer Wheeles......
by Sayjac
Today at 05:17 AM
People Watching ....Airport style.
by ZZman
Today at 04:24 AM
Subaru's at play...
by OneEyeJack
Today at 03:50 AM
Treating a 2003 Jetta
by llmercll
Today at 01:41 AM
Brakes not working - brake pedal sinks
by tookien
Today at 12:42 AM
Dave thinks I can make it 12--15k
by Marco620
Today at 12:26 AM
'05 Impala front wheel "squeal". Cost !
by Lee4212
Today at 12:16 AM
One Dollar Per Gallon?
by Y_K
Yesterday at 11:53 PM
Newest Members
JustaDude, 3horseman, Firedog45, WtsTacoma01, Orion62
65265 Registered Users
Who's Online
87 registered (Andy636, ArrestMeRedZ, 853okg, 2strokeNorthstar, 2015_PSD, 8 invisible), 1618 Guests and 44 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65265 Members
67 Forums
285588 Topics
4765972 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Page 1 of 2 1 2 >
Topic Options
#4542712 - 10/13/17 10:38 PM Amsoil dot 3 & 4 = AutoZone brake fluid?
Iowegian Offline


Registered: 01/05/17
Posts: 273
Loc: Iowa
https://www.amsoil.com/shop/by-product/o...fullDescription

http://m.autozone.com/brake-and-power-st...1_0_0?location=

Same bottle
Same viscosity
Same wet boiling point
1 degree difference in dry boiling point.
....same stuff but much cheaper?

Correct me if I'm wrong?


Edited by Iowegian (10/13/17 10:39 PM)
_________________________
2011 Equinox, 2.4l
2009 Sienna, 3.5l

Top
#4542719 - 10/13/17 10:45 PM Re: Amsoil dot 3 & 4 = AutoZone brake fluid? [Re: Iowegian]
Reddy45 Offline


Registered: 08/15/08
Posts: 2963
Loc: USA
We'll never know! crzy

That being said, brake fluid is pretty much brake fluid.. not much room for creativity given what it's supposed to do.

Top
#4542751 - 10/13/17 11:47 PM Re: Amsoil dot 3 & 4 = AutoZone brake fluid? [Re: Iowegian]
THafeez Offline


Registered: 08/15/16
Posts: 651
Loc: New Jersey
I have a feeling that more expensive brake fluids such as severe duty and maybe full synthetic have a higher boiling point compared to the regular dot 3/4 fluids that just barely pass DOT standards and go for cheap.

Links you posted might as well be the same stuff if bottled by one company. Sometimes they'll put the same stuff that one retailer calls for (amsoil) if the specs are the same or lower for another brand (autozone). It's cheaper that way since they can order in bulk. This is all speculation though.. Just my 2 cents.
_________________________
2004 Toyota Solara SE 2.4 2AZFE
175,000 miles
Valvoline Synpower Maxlife 5W30
Royal Purple 20-400 oversize

Top
#4542764 - 10/14/17 12:10 AM Re: Amsoil dot 3 & 4 = AutoZone brake fluid? [Re: THafeez]
MolaKule Offline


Registered: 06/05/02
Posts: 19042
Loc: Iowegia - USA
Originally Posted By: THafeez
I have a feeling that more expensive brake fluids such as severe duty and maybe full synthetic have a higher boiling point compared to the regular dot 3/4 fluids that just barely pass DOT standards and go for cheap.



All brake fluids have 100% synthetic components today.

https://bobistheoilguy.com/forums/ubbthr...ids#Post3076040

Top
#4542768 - 10/14/17 12:14 AM Re: Amsoil dot 3 & 4 = AutoZone brake fluid? [Re: Iowegian]
StevieC Offline


Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
I use the cheapest stuff I can find that meets the rating required. I change it every couple of years when I replace the pads because most of the fluid is in the lines and out of the master cylinder at that point.

I start out by taking out as much as possible of the remaining fluid in the master cylinder, then top off with fresh fluid (over full) and then slightly crack open the bleeders and let the stuff drip out while I do other work on the vehicle. Keep topping off and then close up the bleeders and check the system for air.

It's really easy and it has served me well for decades.
_________________________
'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

Top
#4542786 - 10/14/17 12:47 AM Re: Amsoil dot 3 & 4 = AutoZone brake fluid? [Re: Iowegian]
Iowegian Offline


Registered: 01/05/17
Posts: 273
Loc: Iowa
But wet boiling point is 368 for both of these. That far exceeds required dot 4 requirements.
_________________________
2011 Equinox, 2.4l
2009 Sienna, 3.5l

Top
#4542801 - 10/14/17 01:20 AM Re: Amsoil dot 3 & 4 = AutoZone brake fluid? [Re: MolaKule]
THafeez Offline


Registered: 08/15/16
Posts: 651
Loc: New Jersey
I don't doubt you MolaKule. Lucas DOT 3 says 100% Full Synthetic on the shelf next to all the other brake fluids. Made me think the rest weren't synthetic and Lucas was superior. Thanks for the clarification. Not a fan of Lucas or their advertising.
_________________________
2004 Toyota Solara SE 2.4 2AZFE
175,000 miles
Valvoline Synpower Maxlife 5W30
Royal Purple 20-400 oversize

Top
#4542814 - 10/14/17 02:36 AM Re: Amsoil dot 3 & 4 = AutoZone brake fluid? [Re: Iowegian]
Wolf359 Offline


Registered: 04/27/12
Posts: 4742
Loc: MA
Those are pretty good specs for a fluid that's supposed to be Dot 3. It basically exceeds Dot 4 specs. Makes me wonder if it's legit or not. Have to check the actual bottle. If you look at the MSDS sheet, it only mentions 446F for Dot 4, but that sheet was revised 20 years ago.

Top
#4542824 - 10/14/17 03:08 AM Re: Amsoil dot 3 & 4 = AutoZone brake fluid? [Re: THafeez]
Colt45ws Offline


Registered: 08/15/06
Posts: 9637
Loc: Central Washington
Originally Posted By: THafeez
I don't doubt you MolaKule. Lucas DOT 3 says 100% Full Synthetic on the shelf next to all the other brake fluids. Made me think the rest weren't synthetic and Lucas was superior. Thanks for the clarification. Not a fan of Lucas or their advertising.

Don't quote me but I don't think Lucas started the "Synthetic" brake fluid labeling. I would say who I think started it but will refrain because Im too lazy right now to research it.
_________________________
-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2

Top
#4542830 - 10/14/17 04:10 AM Re: Amsoil dot 3 & 4 = AutoZone brake fluid? [Re: Iowegian]
rooflessVW Offline


Registered: 12/24/11
Posts: 4030
Loc: North Carolina
Brake fluid is more or less brake fluid for daily driving.

The Bosch can is the performance secret on the parts store shelves.
_________________________
"Zed's dead baby, Zed's dead."

Top
#4542855 - 10/14/17 05:52 AM Re: Amsoil dot 3 & 4 = AutoZone brake fluid? [Re: Iowegian]
demarpaint Offline


Registered: 07/03/05
Posts: 29745
Loc: NY
Sometimes you're paying more for a name. In this case I'd go with the cheaper product, and save the extra cash for something else from Amsoil where you're actually getting value for the added cost.
_________________________
God Bless Our Troops


Top
#4542869 - 10/14/17 06:40 AM Re: Amsoil dot 3 & 4 = AutoZone brake fluid? [Re: Iowegian]
Smoqueed Offline


Registered: 12/24/16
Posts: 92
Loc: Indiana, USA
The bottles don't look entirely the same, and I doubt the Autozone "DOT3" actually has those specs. I would need to go there and double check the bottle itself, sometimes they mix up stuff on the website. Regardless, unless you're tracking the car, using super high boiling point brake fluids is kinda pointless. Most standard DOT3 will work just fine for 99% of people. For a little added protection during spirited driving, I use Valvoline DOT3/4. It's like $6 or $7 for a 32 oz bottle at Meijer. Claims 480F dry and 311F wet boiling points for only a little more than a 32oz bottle of standard DOT3.

Looking back at the autozone website, their 32oz of Autozone fluid has the same specs as the 12oz bottle. Maybe it's not a fluke. If not, that's a terrific price for that level of boiling protection. Also took a look at that Bosch brake fluid. Looks like some super stout stuff. Plus I really like metal cans for brake fluid. However, I wont spend $15 a quart for brake fluid when I've never had problems with the $7 a quart stuff

Top
#4542892 - 10/14/17 07:23 AM Re: Amsoil dot 3 & 4 = AutoZone brake fluid? [Re: Iowegian]
dlundblad Offline


Registered: 09/30/13
Posts: 10011
Loc: Indiana
I just buy ST brake fluid and call it a day.

No need to buy anything else.
_________________________
03 Jeep WJ 4.0 199k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 145k Rotella T5 10w30 Fram TG3980


Top
#4542921 - 10/14/17 08:06 AM Re: Amsoil dot 3 & 4 = AutoZone brake fluid? [Re: Iowegian]
2dogs Offline


Registered: 02/01/17
Posts: 57
Loc: NY
Walmart ST brand for me too. For decades.

Top
#4542936 - 10/14/17 08:20 AM Re: Amsoil dot 3 & 4 = AutoZone brake fluid? [Re: Iowegian]
Iowegian Offline


Registered: 01/05/17
Posts: 273
Loc: Iowa
I will probably just get dot 3 stuff too.
From what I have read, dot 4 absorbs moisture more quickly than dot 3 and must be changed out sooner.
I am looking for the best quality/reliability/durability.
I don't want to have to change brake fluid in 3 years.

Anyway, I brought this up because of the curiosity/news component.
Just ran into this wbile researching.
If others like the Amsoil dot 3 & 4, you might want to look into this.

If someone can educate me? But I would assume that this stuff will probably absorb moisture more quickly?
I am looking to not have to change fluid again for a while but to also have good corrosion resistance.

Thanks!


Edited by Iowegian (10/14/17 08:22 AM)
_________________________
2011 Equinox, 2.4l
2009 Sienna, 3.5l

Top
Page 1 of 2 1 2 >