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@  steveyjr1982 : (21 December 2014 - 01:36 AM) Car is getting old and tired.
@  steveyjr1982 : (21 December 2014 - 01:24 AM) Tired of dumping money into this thing.
@  BlackBetty : (20 December 2014 - 07:47 AM) See if you can pick up a used set of TOG headers then. ive read tons of great things about them when fitment is a concern
@  Sapias Lupus : (19 December 2014 - 09:25 AM) But then again with the SD I've only heard of the fitment issues once or twice and just needing a new flex, So I probably will go with the SD. We'll see.
@  Sapias Lupus : (19 December 2014 - 09:16 AM) (Car came with Dp and Plog from PO, or I would have had headers rather)
@  Sapias Lupus : (19 December 2014 - 09:15 AM) I mean I've already got a plog and dp from zzp but I am going upgrade to headers, and I have utilities to make them work, my only issue is fitment being off and all the other glorious problems said to come with SD, so I was thinking Pacesetter because they are slip and fitted right and the Y is fixed via ZZP (review of leaks but I can just just weld them up.
@  BlackBetty : (19 December 2014 - 07:05 AM) go with speed daddy's. I do everything myself so i went plog/pem.. but would rather have the headers anyday
@  Sapias Lupus : (19 December 2014 - 05:35 AM) I mean so then I don't need clamps and I won't get leaks.
@  Sapias Lupus : (19 December 2014 - 05:24 AM) Pacesetters or Speed Daddys worth it if I have a welder available and an expert to do it for free?
@  novascotiaGS : (18 December 2014 - 01:50 AM) When is the new calendar going to be again available anyone know?
@  Sapias Lupus : (17 December 2014 - 04:01 AM) I went ahead and PMed you, I feel you know the roots of what the motor can handle with the gen 5 from your experience. I'd like to talk more extensively if thats cool.
@  Crazyguy03 : (17 December 2014 - 03:57 AM) it wasnt until I added a S1X that i could take the timing all the way up to 21* no kr
@  Crazyguy03 : (17 December 2014 - 03:56 AM) then I went to a gen5 and FSIC and N* then I was able to run a 3.0 WITH decent timing
@  Crazyguy03 : (17 December 2014 - 03:56 AM) from there i added headers and 1.9s
@  Crazyguy03 : (17 December 2014 - 03:55 AM) lol its hard to understand and remember but I can say I remember where I started it was a bone stock motor with just an intake, 3.4, and tune
@  Sapias Lupus : (17 December 2014 - 03:48 AM) I'll pm you.
@  Sapias Lupus : (17 December 2014 - 03:46 AM) Oh sh*t wait are you saying you ran a 3.4 on a gen 5 with nothing but intake and tune lol and didn't "need" an IC until you dropped again?
@  Sapias Lupus : (17 December 2014 - 03:41 AM) I'm not looking at SSICs I am planning to get the FS. I just don't exactly get what you're saying with the guys with the gen 3 running 3.25 because I'm not getting a SS. IGNORE THIS I think I done goofed
@  ejguillot : (17 December 2014 - 02:03 AM) Hi guys
@  Crazyguy03 : (17 December 2014 - 02:02 AM) I stayed with a 3.4 NO IC NO rockers stock everything but intake and tune I didnt move to a 3.0 until FSIC and 1.9s / cam

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Brake fluid: can synthetic and regular mix?


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#1 RegalBM

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Posted 21 May 2008 - 11:49 PM

I went to Autozone this afternoon trying to buy some regular DOT-3 brake fluid, but surprisingly saw a lot of synthetic fluid, like Prestone and Valvoline, and the regular was rare. The guy at AZ said synthetic is compatible with regular and they can mix. I remember I once read an article on the web saying, once the synthetic fluid is used, it may not be possible to change back to regular any more. Any comments?

Thanks.
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#2 Scimmia

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Posted 22 May 2008 - 01:18 AM

There is no such thing as non-synthetic brake fluid. Some companies use "Synthetic" for marketing, some don't, but it doesn't matter either way.
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#3 attist178

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Posted 22 May 2008 - 03:44 AM

I'm too tired to explain "synthetic" brake fluids...it's complicated and it has big words...lol.

But no, don't mix them. And don't listen to parts store guys...the majority of them have absolutely no idea what they're talking about.

A good rule of thumb: Don't mix stuff with different names.
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#4 Scimmia

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Posted 22 May 2008 - 01:30 PM

I'm too tired to explain "synthetic" brake fluids...it's complicated and it has big words...lol.

But no, don't mix them.


I'd be VERY interested in hearing the explaination, or atleast getting a reference. This is contrary to everything that I've found about brake fluid. Polyethylene Glycol is by it's very nature synthetic, so there is no brake fluid out there that's not synthetic.

Unless you were thinking of DOT5 (silicon) fluid vs DOT3/4, which isn't what we're talking about here.
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#5 RegalBM

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Posted 22 May 2008 - 03:28 PM

OK, can I do this as a bottomline? Pump the old brake fluid out from the master cylinder reservoir and then put the synthetic fluid in. Since can't get all the old fluid completely out from the brake system, there will still be some mix but it seems to me it should be much better. Would this be fine?
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#6 oakleafresin

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Posted 22 May 2008 - 03:47 PM

For what its worth, I flushed my brake lines out last year with "Synthetic" Prestone fluid from Autozone and I havent had a single problem stopping. I used a Mitty Vac. I took as much of the old crap out of the master cylinder as I could and refilled it with the Prestone. Then I bled each caliper till clear(ish) fluid came out.

A couple weeks ago I rebled them using this process and the fluid looked opaque and dark brown (rather than black/green) almost like rust. I dont know wtf the deal was with that but the car is still stopping great lol. Im sure dark brown is a normal color though. Would probably turn green eventually.
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#7 Scimmia

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Posted 22 May 2008 - 09:55 PM

OK, can I do this as a bottomline? Pump the old brake fluid out from the master cylinder reservoir and then put the synthetic fluid in. Since can't get all the old fluid completely out from the brake system, there will still be some mix but it seems to me it should be much better. Would this be fine?


Bottom line is that all DOT3/4/5.1 fluids are compatible, and all synthetic. As long as you don't get DOT5, you're fine. I'm guessing that attist178 was confusing synthetic with silicon.
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#8 Dusty

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Posted 23 May 2008 - 05:05 PM

+1 on mixing DOT 3/4/5.1 Just say away from DOT 5 silicone
If you have not flushed the fluid recently I would just get a big bottle of Dot 3 or 4 synthetic and change out the fluid. Easy to do with a helper to push the brake pedal.
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#9 RegalBM

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Posted 03 June 2008 - 01:33 AM

I hope this is the ultimate answer...I got a chance to talk with a good friend of mine today, who holds a chemistry PhD and is a technical team leader in the R&D department of Valvoline. He said no problem to mix the synthetic with the regular ones (I am not going to elaborate his explanation here).

Just wanted to post this fyi and hope it helps.
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#10 Guest_LSChris_*

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Posted 03 June 2008 - 06:16 AM

+1 on mixing DOT 3/4/5.1 Just say away from DOT 5 silicone

^^X2
DOT 5 silicone fluid is not compatible with conventional brake fluids and they will seperate over time if mixed. DOT 5 silicone brake fluid can't be used in systems with ABS because the action of the ABS unit will induce air into the system.
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#11 RegalBM

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Posted 03 June 2008 - 04:11 PM

+1 on mixing DOT 3/4/5.1 Just say away from DOT 5 silicone

^^X2
DOT 5 silicone fluid is not compatible with conventional brake fluids and they will seperate over time if mixed. DOT 5 silicone brake fluid can't be used in systems with ABS because the action of the ABS unit will induce air into the system.


Yes, my friend meant DOT-3/4/5.1 and no mix with DOT-5.
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