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Valvoline DOT 3/4 "synthetic brake fluid? Possible #2566812
03/13/12 10:06 PM
03/13/12 10:06 PM
Joined: Mar 2012
Posts: 5,133
chicago, Illinois
antiqueshell Offline OP
antiqueshell  Offline OP
Joined: Mar 2012
Posts: 5,133
chicago, Illinois
Just was checking out the Valvoline site and they have a product called Synthetic DOT 3/4 Brake fluid.

I was always led to believe that the only synthetic DOT was silicone DOT 5.

Is the Valvoline product I mention compatible with mineral based DOT 3 and 4?

Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell] #2566819
03/13/12 10:14 PM
03/13/12 10:14 PM
Joined: Sep 2003
Posts: 3,132
Austin, Texas
Brons2 Offline
Brons2  Offline
Joined: Sep 2003
Posts: 3,132
Austin, Texas
There is also an unofficial DOT5.1, which is silicone level performance but with a conventional fluid.


2012 Hyundai Sonata GLS 6MT 2.4GDI, ProDS 10w30, XG9688 filter, 2018 Mitsubishi Outlander SEL 2.4 CVT, Factory fill still.
Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell] #2566820
03/13/12 10:15 PM
03/13/12 10:15 PM
Joined: Aug 2006
Posts: 9,798
Central Washington
Colt45ws Offline
Colt45ws  Offline
Joined: Aug 2006
Posts: 9,798
Central Washington
Its a play on what synthetic means. It has the same composition as any other OTC DOT 3/4 brake fluid.


-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
Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: Colt45ws] #2566827
03/13/12 10:17 PM
03/13/12 10:17 PM
Joined: Feb 2006
Posts: 627
Watkins Glen, NY USA
ffracer Offline
ffracer  Offline
Joined: Feb 2006
Posts: 627
Watkins Glen, NY USA
I have used it for years and it has better cold weather properties than just DOT3 brake fluid. the brake and clutch pedals are more responsive and consistent in the cold than regular DOT3. Multiple cars and very obvious.

Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell] #2566842
03/13/12 10:26 PM
03/13/12 10:26 PM
Joined: Dec 2002
Posts: 42,085
New Jersey
JHZR2 Offline
JHZR2  Offline
Joined: Dec 2002
Posts: 42,085
New Jersey
Brake fluid is a glycol, IIRC. Likely they are all synthesized.

Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell] #2566861
03/13/12 10:45 PM
03/13/12 10:45 PM
Joined: Jan 2011
Posts: 918
Florida, USA
Towncivilian Offline
Towncivilian  Offline
Joined: Jan 2011
Posts: 918
Florida, USA
Yes, from what I've read here all brake fluid is synthetic. If it's touted on the bottle, it's just a marketing buzzword. DOT 3/4/5.1 are all interchangeable as well (but not DOT5 which is silicone based!), and each has higher minimum wet and dry boiling points than the previous.

Wet boiling point refers to fluid that is 3.7% water by volume.
Code:
Dry boiling point:Wet boiling point:
DOT3:205 C (401 F)140 C (284 F)
DOT4:230 C (446 F)155 C (311 F)
DOT5:260 C (500 F)180 C (356 F)
DOT5.1:270 C (518 F)190 C (374 F)

I run the mentioned Valvoline DOT3/4 brake fluid in my Pathfinder with no problems.


2001.5 Pathfinder SE 3.5L A/T 2WD - ML NG 5W-30/PL14610
2007 Altima S - PU 5W-30/M1-110
2009 G5 - PU 5W-30/XG9018
2012 G37 S - ST 5W-30/PL14612
Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell] #2567115
03/14/12 09:12 AM
03/14/12 09:12 AM
Joined: Feb 2012
Posts: 8,385
New England
Jarlaxle Offline
Jarlaxle  Offline
Joined: Feb 2012
Posts: 8,385
New England
Actually, silicone & glycol fluid can be mixed...no problem, but you lose the benefits of silicone brake fluid.


1979 Coupe de Ville, 542 stroker, Super Tech 15W40, Purolator
2011 Crown Vic P71, 5W-20 NextGen, Motorcraft
Bike crashed. frown
Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell] #2567120
03/14/12 09:17 AM
03/14/12 09:17 AM
Joined: Jun 2010
Posts: 2,750
Rochester, NY
rslifkin Offline
rslifkin  Offline
Joined: Jun 2010
Posts: 2,750
Rochester, NY
Not all systems have seals and lines that can tolerate the silicone fluid, IIRC.


1998 Jeep Grand Cherokee 5.9 Limited with lots of mods (225k miles, bought with 100k in 1/2010)
Rotella T6 @ 6k OCI
Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell] #2567243
03/14/12 11:42 AM
03/14/12 11:42 AM
Joined: Dec 2002
Posts: 6,382
Washington St.
Ken2 Offline
Ken2  Offline
Joined: Dec 2002
Posts: 6,382
Washington St.
There is a minor chemical difference between the different grades of polyether glycol brake fluid to give it the various wet boiling temperatures, usually the addition of a borate compound. I don't know about Valvoline's labeling of this brake fluid as DOT3 and DOT4 except for marketing reasons. There are a very few brake systems that are designed for DOT3 and the rubber-like materials cannot tolerate the chemicals in DOT4 fluid. Maybe Valvoline found a way around this???

As described above, there is no natural brake fluid and all are synthetic. Putting "synthetic" on the label is just marketing hype.


Every gun that is made, every warship launched..a theft from those who hunger and are not fed, those who are cold and not clothed.
Gen. Eisenhower

Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell] #2567398
03/14/12 02:16 PM
03/14/12 02:16 PM
Joined: Aug 2010
Posts: 5,675
WatUpDoc
ltslimjim Offline
ltslimjim  Offline
Joined: Aug 2010
Posts: 5,675
WatUpDoc
Whatever happened to Valvoline's SynPower Dot 4 synthetic? I've 'heard' of it but never used it. confused ???

Same as their Dot 3/4 synthetic that is regularly available? shrug


92 Civic Hatch (stolen frown RIP)
07 Honda Fit Sport (A/T) WELCOME thumbsup
Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell] #2567638
03/14/12 06:24 PM
03/14/12 06:24 PM
Joined: Sep 2006
Posts: 19,479
Chicago Area
mechtech2 Offline
mechtech2  Offline
Joined: Sep 2006
Posts: 19,479
Chicago Area
All brake fluid is synthetic.

The DOT5 has SILICONE .

Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: ltslimjim] #2569721
03/16/12 03:19 PM
03/16/12 03:19 PM
Joined: Sep 2007
Posts: 8,598
Florida
artificialist Offline
artificialist  Offline
Joined: Sep 2007
Posts: 8,598
Florida
Originally Posted By: ltslimjim
Whatever happened to Valvoline's SynPower Dot 4 synthetic? I've 'heard' of it but never used it. confused ???

Same as their Dot 3/4 synthetic that is regularly available? shrug

They replaced the gold colored "Synpower" containers with the white "DOT3/DOT4" containers.

Either way, it was made to replace DOT3 or DOT4 fluid.


2010 Lancer Ralliart Sportback
Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell] #4468231
07/23/17 05:48 PM
07/23/17 05:48 PM
Joined: Mar 2013
Posts: 3
WA, USA, Tacoma
capsicum Offline
capsicum  Offline
Joined: Mar 2013
Posts: 3
WA, USA, Tacoma
DOT 3 has a maximum cold(-40c) viscosity of 1500cSt. DOT4 a maximum of 1800cSt. DOT5.1 has a maximum cold viscosity of 900cSt.
All 3, 4, and 5.1 have a minimum hot(100c) viscosity of 1.5cSt
So a brake fluid that meets DOT4 minimum boiling temperatures and is under 1500cSt at -40c can meet both dot3 and dot4 specs.
Likewise a fluid can greatly exceed 5.1 boiling temps but due to viscosity above 900cSt it will only qualify as a DOT3/4 or if between 1500 and 1800 as a straight DOT4. (redline and amsoil racing are in this last category)

The valvoline DOT3/4 spec sheet was not proof read and does not list the product specific boiling points nor any viscosities.

Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: capsicum] #4468376
07/23/17 08:29 PM
07/23/17 08:29 PM
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
Originally Posted By: capsicum
DOT 3 has a maximum cold(-40c) viscosity of 1500cSt. DOT4 a maximum of 1800cSt. DOT5.1 has a maximum cold viscosity of 900cSt.
All 3, 4, and 5.1 have a minimum hot(100c) viscosity of 1.5cSt
So a brake fluid that meets DOT4 minimum boiling temperatures and is under 1500cSt at -40c can meet both dot3 and dot4 specs.
Likewise a fluid can greatly exceed 5.1 boiling temps but due to viscosity above 900cSt it will only qualify as a DOT3/4 or if between 1500 and 1800 as a straight DOT4. (redline and amsoil racing are in this last category)

The valvoline DOT3/4 spec sheet was not proof read and does not list the product specific boiling points nor any viscosities.


Which DOT, if any, improves ABS?


2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30
Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: SilverFusion2010] #4469001
07/24/17 02:32 PM
07/24/17 02:32 PM
Joined: Jan 2016
Posts: 315
Cheshire, England
barryh Offline
barryh  Offline
Joined: Jan 2016
Posts: 315
Cheshire, England
Originally Posted By: SilverFusion2010


Which DOT, if any, improves ABS?


DOT 4+

Sometimes called super DOT 4, it has a max viscosity at -40 C of 750 cSt

I used this recently and the lower viscosity is evident at normal temperatures which makes it work well for gravity bleeding.


Barry

1979 BMW R45 (Triple QX 5W40)
2009 Mercedes C180K (Shell Helix Ultra 5W40)
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