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03-13-2009, 10:22 AM
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#1
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Junior Member
Join Date: Feb 2009
Posts: 22
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workhorse/chevy chassis dot3 or dot4
I do believe the manual calls for dot 3, Dot4 I read in another post absorbs water faster? but boils at a higher temp?
I intend to at least swap out the reservoir fluid for now and as soon as I can get someone to help bleed and flush the lines I will finish flushing.
Should I go with dot 4 or dot 3?
I have read so much contridiction on this subject and am not sure which is better?
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03-13-2009, 11:07 AM
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#2
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Senior Member
Official iRV2 Sponsor
Join Date: Jun 2008
Location: Centralia, WA
Posts: 1,216
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Dot 4
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03-14-2009, 02:05 AM
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#3
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: Sep 2007
Posts: 2,976
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Quote:
Originally Posted by Flattrip
I do believe the manual calls for dot 3, Dot4 I read in another post absorbs water faster? but boils at a higher temp?
I intend to at least swap out the reservoir fluid for now and as soon as I can get someone to help bleed and flush the lines I will finish flushing.
Should I go with dot 4 or dot 3?
I have read so much contridiction on this subject and am not sure which is better?
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check the CASTROL website for dot4 lma (low moisture affinity) brake fluid. this is what i am using. it is very reasonably priced and is available at most any auto supply store.
it took 9 and 1/2 12 oz cans to change the reservoir and flush the calipers on my moho.
__________________
01 WINNEBAGO 35U W20.8.1L 5sp allison SW Wa,. Good Sam, SKP. RVM 198 AMSOIL fluids. BANKS ecm program. SCAN GAUGE II w/ Ally temp. 2 LIFELINE GPL-6CT AGM Batts on their sides. Michelins, TST tptts. K&N panel air filter. AERO mufflers. TAYLOR plug wires. ULTRA POWER track bar. KONI fsd shocks, toad '21MB GLA FWD on dolly
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03-14-2009, 09:28 AM
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#4
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Junior Member
Join Date: Feb 2009
Posts: 22
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I was at the autoparts store ready to buy fluid and I spotted synthetic from valvoline. It says it has a lower moisture absorbency rate and boiling pt of 480 degrees.
Thanks Jon and Dan -- That castrol sounds good and from the data sheet appears to have a bp of 509 which is better than the valvoline. I'll have to check later
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03-14-2009, 09:34 AM
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#5
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Senior Member
Workhorse Chassis Owner
Join Date: Oct 2007
Posts: 152
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All brake fluid is sythetic........but not shown on all brands...
__________________
Newmar Kountry Star 2005 37'
8.1 Workhorse w/UltraPower,Taylor 409 plug wires,AC Delco 41-993 Plugs and OEM Engineering Fuel Filter Adaper
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03-14-2009, 09:36 AM
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#6
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Senior Member
Workhorse Chassis Owner
Join Date: Oct 2007
Posts: 152
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I changed mine to the Valvoline Dot 4 and flushed the entire system ...
BTW it was pretty dark...
__________________
Newmar Kountry Star 2005 37'
8.1 Workhorse w/UltraPower,Taylor 409 plug wires,AC Delco 41-993 Plugs and OEM Engineering Fuel Filter Adaper
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03-14-2009, 09:38 AM
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#7
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Moderator Emeritus
Winnebago Owners Club Workhorse Chassis Owner Coastal Campers Carolina Campers
Join Date: Jan 2000
Location: Conway, SC
Posts: 23,641
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That is true, all currently available brake fluid is synthetic.
I wrote this piece is response to Whaler:
Quote:
Originally Posted by Whaler
,WE NEED A BETTER BRAKE FLUID!!!If it exists.
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Whaler, Well " one" better brake fluid does exist. It's made by Motorcraft. It's Ford DOT3 brake fluid. It has a boiling point of 550° which is the same temperature as DOT5. The stuff is expensive BUT it's the best.
__________________
03 Adventurer 38G, Workhorse W22
F&R Track Bars, Safety+ , Ultrapower, Taylor Extremes, SGII
TST 507, Blue Ox, SMI, Koni FSD, CrossFire
RV/MH Hall of Fame - Lifetime Member
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03-14-2009, 10:25 AM
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#8
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Junior Member
Join Date: Feb 2009
Posts: 22
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03-14-2009, 12:44 PM
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#9
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Senior Member
Tiffin Owners Club Nor'easters Club Ford Super Duty Owner
Join Date: Aug 2007
Posts: 894
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__________________
2011 Allegro 32CA \ 2013 CRV toad
Previous:2007 Winnebago Class C
99' Winnebago Adventurer /Towables
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03-14-2009, 06:41 PM
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#10
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Senior Member
Tiffin Owners Club Nor'easters Club Ford Super Duty Owner
Join Date: Aug 2007
Posts: 894
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__________________
2011 Allegro 32CA \ 2013 CRV toad
Previous:2007 Winnebago Class C
99' Winnebago Adventurer /Towables
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03-15-2009, 01:28 PM
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#11
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Junior Member
Join Date: Feb 2009
Posts: 22
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Castrol was a little hard to find in my area, Pep boys had it. I will give it a go
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03-16-2009, 06:17 AM
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#12
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Senior Member
Join Date: Feb 2003
Location: Jarrell, TX 76537
Posts: 4,501
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Unless you plan to do some hard braking or do not plan to change very often DOT 3 from Wal Mart at $3.50 a quart is all you need. I have started to change mine every year. We are looking at $12 and 30 mins of work.
For this last change/flush I went with some DOT 4 as it was on sale at the local autoparts store.
__________________
Dale
AKA - Oemy
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