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Brake fluid DOT 3 or DOT 4?

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TheOtherLeft

Joined: Sun Aug 27, 2006 11:30 pm
Posts: 818
Location: Sydney

Posted: Wed Feb 16, 2011 10:56 am

Even though the FSM mentions only using DOT3 is it OK to use DOT4 instead?

Wouldn't DOT 4 being a more advanced fluid be better then using the older DOT 3 as it has higher boiling properties but still based off the same glycol mix?

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2002 SWB GV
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steak_knife

az supporter

Joined: Fri May 22, 2009 11:30 pm
Posts: 21335
Location: Smart Ass Island

Posted: Wed Feb 16, 2011 11:01 am

4 dot's please, dot 3 is almost non existent, even Suzuki think it's strange that they still specifie 3 dot's....

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BlueSuzy

az supporter

Joined: Sun May 04, 2008 11:30 pm
Posts: 9716
Location: NSW
Vehicle: SJ51 LWB, SJ70 SWB

Posted: Wed Feb 16, 2011 11:16 am

Dot 3, 4, 5.1 are interchangeable and will mix.

Dot 5 is not interchangeable. Will not mix. Whole system has to be flushed clean and dry for dot 5. A limited amount of brakes use dot 5.

A good explanation For dot 3 and linked to others: http://en.wikipedia.org/wiki/DOT_3

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BlueSuzy wrote:

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Jester

Joined: Fri May 08, 2009 11:30 pm
Posts: 726
Location: Adelaide
Vehicle: 1985 Suzuki MightyBoy

Posted: Wed Feb 16, 2011 6:19 pm

dot 3 is still quite common alot of toyotas and subarus specify only dot3

TheOtherLeft

Joined: Sun Aug 27, 2006 11:30 pm
Posts: 818
Location: Sydney

Posted: Wed Feb 16, 2011 9:51 pm

So what gives then???

The brake fluid reservoir cap on my GV says DOT3 ONLY, the FSM only states DOT3.

Could there be parts compatibility issues?

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2002 SWB GV
Lifted and Locked

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