Can DOT 4 be used in place of DOT 3?
 

I thought someone on this board might know the answer: I have a liter of DOT 4 brake fluid that I bought for my Mercedes, but I also have a Nissan that I want to flush. The Nissan's owner's manual says DOT 3. Can I use the DOT 4 fluid to flush it with? I vaguely remember reading once that you can use DOT 4 in a DOT 3 system, but not DOT 3 in a system that requires DOT 4. Is that true?

Thanks,

GregS

DOT 4 is ok
 

You can use it, however, make sure it has not been sitting around collecting moisture on the shelf.

More than you wanted to know about the subject.
 

Brake flush every two years?! U'r kidding right?
http://www.peachparts.com/shopforum/showthread.php?t=96852

Enjoy reading. :)