MrDude_1

well i went to the ford dealership (stealership) this afternoon and got ford brake fluid... from last time i looked it up, i recall the ford HD stuff as one of the better choices...

well i just looked at the can i got... its "ford focus only" DOT4 brake fluid.. and it says not for DOT3 systems.

now i know DOT3 and DOT4 to be compatible... DOT5 is silicone and NOT compatible...

but im just curious, did i just spend $20 on the wrong brake fluid?

im flushing the whole system out, and installing braided SS flex lines, a line lock, and adjustible prop valve...

before i go fill/flush my system with this, is it the right stuff?

Mkos1980

iTrader: (8)

I used the Ford HD on my Baer setup. Seems ok to me for the last 3K miles

Chickenman35

Dot 4 is fine. What is the Wet and Dry boiling point? That is the important part. DOT 4 typically has a higher Wet Boiling point that DOT 3.

Here's some excellant info:

http://stoptech.com/whitepapers/brakefluid1a.htm

Dewey316

I'll toss this in here for reference....

Dry Boiling Point Wet Boiling Point Viscosity @ -40°C Viscosity @ 100°C
DOT 2 374°F N/A
DOT 3 401°F 284°F
DOT 4 446°F 311°F 1800 max 1.5 min
DOT 5 (silicone) 500°F 356°F
DOT 5.1 (non - silicone) 500°F 356°F
Castrol LMA DOT 3/4 446°F 311°F N/A N/A
Ford Heavy Duty DOT 3 550°F 290°F N/A N/A
ATE Super Blue Racing 536°F 392°F N/A N/A
ATE TYP 200 536°F 392°F N/A N/A
Motul Racing RBF 600 593°F 420°F N/A N/A
Motul DOT 5.1 N/A 365°F N/A N/A
Motul DOT 4 473°F 316°F N/A N/A
Motul DOT 3 462°F N/A N/A N/A
Prospeed GS610 610°F 421°F 1525 2.5
Castrol SRF 590°F 518°F N/A N/A
Performance Friction 550°F 284°F N/A N/A
AP551 527°F 302°F N/A N/A
AP600
(not DOT approved and not compatible with any other fluids)
572°F 410°F N/A N/A
Ferodo DOT 4 446°F 311°F N/A N/A
Ferodo DOT 5.1 500°F 356°F N/A N/A
Wilwood 570 570°F N/A N/A N/A
Valvoline Synthetic DOT4 502°F 343°F

If you get the boiling points of Ford HD DOT4, we can add it in that list.

Forshock 85TA

My vote

I use all Motul fluids in my mountain bikes, customer bikes and my car. I work for a dealer so its cheaper than the store stuff.

Dewey316

If it wasn't so expensive I'd run Castrol SRF.

For me, pricepoint, and ease of getting it. ATE gets my money.

RTFC

I run Valvoline Synthetic DOT4. You can get it just about anywhere so its easily axcessable, its fairly inexpensive, its compatable with all DOT3 & 4 fluilds so you can mix it, and it has a dry 502* and a wet 343* boiling points.

kevinc

Same here w/ ATE Super Blue. Ever since Bondurant racing school I'm rough on brakes, and this stuff holds up extremely well.