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#2566812 - 03/13/12 10:06 PM Valvoline DOT 3/4 "synthetic brake fluid? Possible
antiqueshell Offline


Registered: 03/02/12
Posts: 5133
Loc: 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?

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#2566819 - 03/13/12 10:14 PM Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell]
Brons2 Offline


Registered: 09/16/03
Posts: 3042
Loc: 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, M1 5w30, OEM filter, 2007 Kia Rondo LX 2.4 I4 5 pass, M1EP 5w30, OEM filter

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#2566820 - 03/13/12 10:15 PM Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell]
Colt45ws Offline


Registered: 08/15/06
Posts: 9648
Loc: 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

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#2566827 - 03/13/12 10:17 PM Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: Colt45ws]
ffracer Offline


Registered: 02/11/06
Posts: 627
Loc: 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.

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#2566842 - 03/13/12 10:26 PM Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell]
JHZR2 Offline



Registered: 12/14/02
Posts: 41805
Loc: New Jersey
Brake fluid is a glycol, IIRC. Likely they are all synthesized.

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#2566861 - 03/13/12 10:45 PM Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell]
Towncivilian Offline


Registered: 01/07/11
Posts: 918
Loc: 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

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#2567115 - 03/14/12 09:12 AM Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell]
Jarlaxle Offline


Registered: 02/02/12
Posts: 8163
Loc: 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, Delco
2011 Crown Vic P71, 5W-20 NextGen, Motorcraft
2014 Harley Sportster 1200T, dealer fill

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#2567120 - 03/14/12 09:17 AM Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell]
rslifkin Offline


Registered: 06/27/10
Posts: 2750
Loc: 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

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#2567243 - 03/14/12 11:42 AM Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell]
Ken2 Offline


Registered: 12/02/02
Posts: 6382
Loc: 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.
_________________________
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#2567398 - 03/14/12 02:16 PM Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell]
ltslimjim Online   happy


Registered: 08/06/10
Posts: 5642
Loc: 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
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#2567638 - 03/14/12 06:24 PM Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell]
mechtech2 Offline


Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
All brake fluid is synthetic.

The DOT5 has SILICONE .

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#2569721 - 03/16/12 03:19 PM Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: ltslimjim]
artificialist Offline


Registered: 09/23/07
Posts: 8598
Loc: 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

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#4468231 - 07/23/17 05:48 PM Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: antiqueshell]
capsicum Offline


Registered: 03/09/13
Posts: 3
Loc: 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.

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#4468376 - 07/23/17 08:29 PM Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: capsicum]
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1665
Loc: 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

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#4469001 - 07/24/17 02:32 PM Re: Valvoline DOT 3/4 "synthetic brake fluid? Possible [Re: SilverFusion2010]
barryh Offline


Registered: 01/09/16
Posts: 312
Loc: 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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