In the last several years we have seen green tinted DOT 3 brake fluid and we are wondering what the contaminate might be. We have seen it in 90’s and 02’s mostly in American made vehicles. I have been in the business since the early 70’s and never saw this in the older cars and am wondering if there…

Mineral brake fluid which is used in European cars is dyed green when new. Do not use them in vehicles designed for glycol-based fluids or the rubber parts of the brake system will be damaged. I should add that unless I missed something that most American vehicles use standard fluid and perhaps the…

Dave, Thank you for your reply, I am aware of the mineral fluid used in a number of the German cars and am certain this fluid is not being used. I had thought of the copper O-rings used in some cars, but I have not seen them used in any American cars, unless they are used somewhere in the ABS syste…

Perhaps the fluid started as blue and now looks green. There are blue brake fluids on the market. That’s the best I can come up with. However, you could try emailing a brake fluid company and see if they can offer some insight. The question is interesting.

What you’re seeing is the copper used in the brazing of brake components oxidizing as the brake fluid breaks down. One of the things that’s checked on todays ABS systems is the amount of copper oxides in the brake fluid. If the concentration of copper oxides goes unchecked, it can raise havoc with A…

That’s interesting. The clutch hydraulics in my VW have a green tinge when I bleed them. They are using the same glycol-based fluid as the brakes (they share a common reservoir for the brake master and clutch master), and to my knowledge there aren’t any copper components in that part of the system. …

geez i used a brake fluid that was recommned by the mechanic i purchase a can of ate blue dot 3 brake fluid does it mean i am using crappy fluid?

I have an 01 International 4700 and recently had a lot of break work done. A couple front calipers rotors pads and a flush. Then an ABS recall was found and addressed. A month after the original brake job was done I had to replace a 3rd passenger side steer caliperbecause it was sticking according t…

Green brake fluid

Maintenance/Repairs

Kuiama September 24, 2008, 4:45pm 9

Isn’t the blue brake fluid used to determine when all the old brake fluid is removed during bleeding? It seems to me that the green fluid may be a combination of blue fluid and old yellow fluid that could occur if all the old yellow stuff was not completely removed from the system during bleeding. On the other hand, if this green stuff is seen in a new car in which the brakes have never been bled, than I have no idea.

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Green brake fluid

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