workhorse/chevy chassis dot3 or dot4

[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?

[JonBrazel]

Dot 4

[DAN L]

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?

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.

[Flattrip]

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

[stubeje]

All brake fluid is sythetic........but not shown on all brands...

[stubeje]

I changed mine to the Valvoline Dot 4 and flushed the entire system ...
BTW it was pretty dark...

[DriVer]

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.

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.

[Flattrip]

Interesting page here:

http://forums.hybridz.org/showthread.php?t=103862

[ctcamper]

Ford in a Chevy? shhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

If we do, we better not tell hehe

[ctcamper]

Here is the data sheet on the oem fluid.


http://www.acdelcotechconnect.com/pd..._delco_sup.pdf

[Flattrip]

Castrol was a little hard to find in my area, Pep boys had it. I will give it a go

[oemtech]

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.