Recent Topics
Brand new ancient QS 10-20w30 in my '70 Datsun 510
by jayg
04/20/14 01:36 PM
Ryobi 1/6 sheet sander
by expat
04/20/14 12:42 PM
Orphan Black
by Papa Bear
04/20/14 12:40 PM
Propane tank gas level indicators?
by 123Saab
04/20/14 12:12 PM
9012 vs H7
by G-MAN
04/20/14 12:11 PM
Opinions on Ross Signature Series 294s- Good?
by The_Eric
04/20/14 11:46 AM
84 mpg. Really.
by Kuato
04/20/14 11:18 AM
Impala 2008 recall
by Durango
04/20/14 10:50 AM
Issues with simple mp3/wma player.
by mrsilv04
04/20/14 09:26 AM
Finally installed Lifeliner GLS on the Focus
by Miller88
04/20/14 08:42 AM
My PYB expierence
by Georgiaboy2109
04/20/14 08:24 AM
Any GM L-76 (LS-X variant) V8 owners out there?
by SuperEd73
04/20/14 07:52 AM
Newest Members
hammere30, SpartanSoul, jriordanzoom, Jamus, Tim44
49640 Registered Users
Who's Online
71 registered (97f150, Azeem, 901Memphis, 97tbird, AEHaas, 5 invisible), 1689 Guests and 177 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
49640 Members
64 Forums
212153 Topics
3325347 Posts

Max Online: 2605 @ 04/19/14 12:41 PM
Donate to BITOG

Topic Options
#1092949 - 02/25/08 06:10 AM OK to mix synthetic brake fluid with regular?
Back40 Offline


Registered: 04/07/04
Posts: 187
Loc: South Carolina
Is it ok to top off reqular brake fluid with synthetic?

Top
#1092959 - 02/25/08 06:23 AM Re: OK to mix synthetic brake fluid with regular? [Re: Back40]
WishIhadatruck Offline


Registered: 05/09/06
Posts: 1245
Loc: Grand Rapids, MI
I believe all brake fluid is synthetic. Someone else can probably confirm that.
_________________________
1996 Buick Roadmaster Wagon
2001 Pontiac Grand Prix
2003 2500 Suburban, 8.1L

Top
#1092960 - 02/25/08 06:28 AM Re: OK to mix synthetic brake fluid with regular? [Re: WishIhadatruck]
zrxkawboy Offline


Registered: 11/30/04
Posts: 874
Loc: SD
 Originally Posted By: WishIhadatruck
I believe all brake fluid is synthetic. Someone else can probably confirm that.


true

Top
#1093021 - 02/25/08 08:31 AM Re: OK to mix synthetic brake fluid with regular? [Re: zrxkawboy]
VaderSS Offline


Registered: 06/10/02
Posts: 2077
Loc: Cordelia, CA
It is not Ok to mix DOT5 silicon brake fluid with any other fluid.

If you are talking about Valvoline Synpower though, it's a standard, though high quality, DOT4, all of which are synthetic, and fine to mix with most any DOT3/4 with.

That said, why are you "topping off" brake fluid? If there is a leak, you need to fix it, and if it is the disk brakes wearing, you should not top off because when you change the brakes, you'll overflow the reservoir.
_________________________
'88.5 Samurai
'96 Impala SS
'07 Focus ST
'07 Burgman 650 Executive
'08 Gold Wing

Top
#1093070 - 02/25/08 09:39 AM Re: OK to mix synthetic brake fluid with regular? [Re: VaderSS]
Back40 Offline


Registered: 04/07/04
Posts: 187
Loc: South Carolina
Thanks for the feedback folks. 10-4 vader

Top
#1093238 - 02/25/08 02:55 PM Re: OK to mix synthetic brake fluid with regular? [Re: Back40]
mechtech2 Offline


Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
It's good to top off low fluid. Sucking it out first is normal and good procedure when replacing pads.
But adding fresh fluid keeps air and thus moisture down in the system, and mixes fresh fluid with the old. It's a win win situation.
And all brake fluid is synthetic, like mentioned. Just watch out for the silicone based stuff.

Top