[DeTomaso] DOT-5 Brake fluid myths
j g
notstock at yahoo.com
Mon Dec 15 14:03:47 EST 2008
2 compatible chemistries glycol ethers, non silicon borate esters
dot 5.1 is either a glycol ether, non silicon borate ester or a blend of the 2 noted as 5.1 to distinguish from silicon based 5.0
jg
--- On Mon, 12/15/08, j g <notstock at yahoo.com> wrote:
> From: j g <notstock at yahoo.com>
> Subject: Re: [DeTomaso] DOT-5 Brake fluid myths
> To: detomaso at realbig.com, garth_rodericks at yahoo.com
> Date: Monday, December 15, 2008, 12:55 PM
> no brake fluid is compressible period.
> Dot 5 fluids come in different chemistries just as dot
> 3/4/4.5 fluids do.
> silicon based dot 5 fluids as are reccomended in Harley
> davidson and certain aircraft applications are based on a
> silicon chemistry and have a specific issue of being able to
> include a very large amount of dissolved air in the fluid.
> This is what makes silicon based dot 5 fluids seam to have a
> spongy pedal feel , To eliminate this the fluid must either
> be heated during the fill and bleeding process or must be
> vaccuumed prior and during the fill procedure to ensure that
> dissolved air is removed.
> most auto brake systems are not compatible with silicon
> based chemistries and will rapidly deteriorate if these dot
> 5 fluids are used . There are dot 4 , 4.5 and 5 based fluids
> that are all glycol based or synthetic non silicon that are
> compatible with all standard dot 3 compatible systems and
> extend your wet and dry boiling points well above dot 3
> fluids . for almost all applications the ford , valvoline
> synthetic in the gold bottle have dot 5 ratings but are
> glycol ststem compatible. valvoline syntec is only 7 dollars
> a quart at autozone or oreilys .
>
> jg
>
>
> --- On Mon, 12/15/08, Garth Rodericks
> <garth_rodericks at yahoo.com> wrote:
>
> > From: Garth Rodericks
> <garth_rodericks at yahoo.com>
> > Subject: [DeTomaso] DOT-5 Brake luid
> > To: detomaso at realbig.com
> > Date: Monday, December 15, 2008, 12:41 PM
> > I don't know that DOT 5 Silicon brake fluid is
> > "unstable" but it is compressible, which
> > means a soft brake pedal. Silicon fluid is a good
> choice
> > for trailer queen show cars and
> > museum display vehicles because it doesn't absorb
> > moisture. But, the compressible
> > nature of the silicon fluid causes a spongy pedal,
> which is
> > fine for a car that's never driven,
> > other than on and off a trailer at shows, it's
> fine.
> >
> > Don't confuse DOT 5 with DOT 5.1 fluid though. DOT
> 5.1
> > is an Ethyl Glycol based fluid like
> > DOT 3 and DOT4 fluid and is suitable for use on a
> > street/track driven car.
> >
> > ATE Super Blue Racing Brake Fluid ($11.95)
> > One of the best values I could find for a
> high-performance
> > brake fluid (536/392 dry/wet
> > boiling point), and only $12 for 33.8 oz. (I ordered
> from
> > www.bavauto.com) And, the Blue
> > color makes it extremely easy to see when all the old
> fluid
> > is flushed from your system. The
> > same formula also comes in Amber/Gold to make it easy
> to
> > see when all the fluid is flushed
> > from your brake system by alternating colors at each
> fluid
> > flush.
> > Blue:
> >
> http://www.tirerack.com/brakes/ate/ate_superblue_fluid.jsp
> > Amber:
> >
> http://www.tirerack.com/brakes/ate/ate_type200_amber.jsp
> >
> >
> > Here are some of the other fluids I looked at:
> >
> > Brake Fluid Dry Boiling Point Wet Boiling
> > Point Price
> > AP SUPER 600
> > 590°F
> 410°F
> > $18.00/16.9oz
> > CASTROL SRF
> > 590°F
> 518°F
> > $69.99/33.8oz
> > NEO SUPER DOT 610
> > 610°F
> 421°F
> > $15.00/12oz
> > MOTUL RACING 600
> > 593°F
> 420°F
> > $15.00/16.9oz
> > MOTUL DOT 5.1
> > 509°F
> 365°F
> > $6.50/16.9oz
> > **ATE SUPER BLUE
> > 536°F
> 392°F
> > $11.99/33.8oz**
> > VALVOLINE SYNPOWER
> > 503°F 343°F
> > $4.97/16.9oz
> > ATE SL
> > 500°F
> 329°F
> > $7.95/16.9oz
> > CASTROL LMA
> > 450°F
> 311°F
> > $3.50/16.9oz
> > AP 551
> > 528°F
> 288°F
> > $12.50/16.9oz
> > *Ford C6AZ-19542-AA 550°F
> > 290°F $6.95/12oz*
> >
> > * Ford Heavy Duty DOT 3 is very inexpensive and is
> popular
> > among racers because of its
> > excellent dry boiling point. It’s considered by many
> to
> > be the best-kept secret in brake
> > fluids. However, IT ABSORBS MOISTURE QUICKLY!
> > Recommended by Baer and Alcon.
> > According to Hot Rods and Horsepower: "Ford Motor
> > Company purchases [Castrol SRF] by
> > the barrel, repackages it, and sells it as Ford
> Heavy
> > Duty fluid to owners of heavy-duty
> > trucks. Although this rumor is often repeated on the
> > internet, the two fluids have different
> > specs, so the assertion seems questionable at best.
> You may
> > buy it from your local Ford
> > dealer under part number C6AZ-19542-AA.
> >
> > ** ATE Super Blue DOT 4 is even LESS expensive per
> ounce
> > than the Ford Heavy Duty
> > brake fluid, and it ABSORBS MOISTURE SLOWLY! Note
> the
> > ‘wet’ boiling point - That
> > means better performance under extreme conditions
> (track
> > use or a spirited drive through
> > the twisties). And it’s less likely to cause
> corrosion in
> > your braking system. That’s why I
> > chose the ATE Super Blue (I’ll use Gold when I flush
> the
> > brake fluid again next year). And
> > the alternating color options (Blue and Gold) make it
> easy
> > to tell when you’re done flushing
> > all the old fluid from your brake lines. Two
> enthusiastic
> > thumbs up!
> > Reference:
> >
> http://www.realbig.com/pipermail/detomaso/2008-July/097637.html
> >
> > Cheers!
> > Garth
> >
> >
> >
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