Can I use DOT4 in place of DOT3 with no problem?

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Hi. The manual calls for DOT3 brake fluid in brakes system. Can I use DOT4 instead? I am assuming I could but would like some confirmation. Thanks.
 
Any glycol-based fluid will work in your system. That means DOT3, DOT4, and DOT5.1 (or DOT4+ in some cases). DOT5 is silicone-based and will not play nice with the existing fluid.
 
The funny thing is, the brake fluid reservoir cap states "ONLY DOT3" whereas the clutch pump fluid reservoir cap states "DOT3 or 4).

So the question is: Why "ONLY DOT3" on the brake fluid reservoir cap?

btw, mine a Isuzu Trooper 3.1 TDi.
 
IGNORE and use either with confidence.

FORD DOT3 by the number could easily be DOT4 if they wanted to label it as such.
 
I've been told that DOT 4 has a higher boiling point, but is more prone to absorbing moisture. It'll work fine, though.
 
Quote:


I've been told that DOT 4 has a higher boiling point, but is more prone to absorbing moisture. It'll work fine, though.



Yup, so be sure to change it at least every three years.
 
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