Brake Fluids - BMW Luxury Touring Community
 
LinkBack Thread Tools Display Modes
post #1 of 5 Old Oct 6th, 2005, 2:18 am Thread Starter
 
Join Date: Apr 2003
Posts: 98
Red face Brake Fluids

I read in a recent post that if you use a DOT 5 fluid it doesn't have to be changed again.

Could someone please explain the difference between a DOT4 and DOT5 oil change.

Thanks for the response.
Colin1952 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old Oct 6th, 2005, 7:22 am
Senior Member
 
Join Date: Sep 2002
Location: Ormond Beach, FL, USA
Posts: 855
Quote:
Originally Posted by Colin1952
I read in a recent post that if you use a DOT 5 fluid it doesn't have to be changed again.

Could someone please explain the difference between a DOT4 and DOT5 oil change.

Thanks for the response.
Not true. DOT 5 fluid still has to be changed, however it has a higher heat tolerance & presents no danger to paint. Other than that, it's not worth the effort. DOT 4 & DOT 5 are *not* compatible! Mix even a tiny amount of DOT 4 (the residue in the line) with the DOT 5 , & you'll get a jello like substance that'll clog your entire brake system. It's nearly impossible to flush *all* the DOT 4 out, so the effort just isn't worth it.

Jinks ('86fxrs, '07 FLTR)
#64

Remember, "No good deed goes unpunished"
Jinks is offline  
post #3 of 5 Old Oct 6th, 2005, 7:29 am
 
Join Date: Feb 2004
Posts: 4,905
DOT4 is a glycol-based fluid, while DOT5 is silicon-based. They don't mix! My advice? Use ONLY DOT4 brake fluid.
messenger13 is offline  
 
post #4 of 5 Old Oct 6th, 2005, 7:40 am
Senior Member
 
Join Date: Jun 2005
Location: Wadsworth, OH, USA
Posts: 103
Joe is correct. Since you don't know which seals may
not tolerate dot5 don't risk it.

The other negative about dot 5 is, being silicone based it does
not absorb moisture as dot3/dot4 do. So the moisture will
settle in the lowest part of your braking/clutch system
jazzbass is offline  
post #5 of 5 Old Oct 6th, 2005, 6:54 pm Thread Starter
 
Join Date: Apr 2003
Posts: 98
Thumbs up

Thanks guys. DOT4 it is.
Colin1952 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the BMW Luxury Touring Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
flashing brake failure light revisited LoneAmigo K1200LT 4 Oct 30th, 2008 10:08 pm
Brake speed bleeder 2wheeler K1200LT 11 Nov 19th, 2005 8:29 pm
Brake Light Switch jeffklt K1200LT 7 Nov 15th, 2005 3:24 pm
Brake Light On gunny K1200LT 2 Oct 27th, 2005 10:38 pm
Brake light problem buffalo K1200LT 3 Oct 23rd, 2005 4:34 am

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome