What makes brake fluid turn green, when it starts out light tan to gold?
Flushed the factory fluid on one of my vehicles after 2 1/2 years. It was distinctly darker than new, but just brown. Fast-forward 2 1/2 more years to the next flush. The fluid in the master cylinder, all the calipers, and throughout the lines was green. Probably darkest (not by much) in the master cylinder reservoir, but at least the one caliper was also that dark.
Both 2 1/2 years ago and yesterday the old fluid was also distinctly more opaque (cloudy).
Why did this fluid turn green? Is that just the color they intend for it to turn as it ages and breaks down? When new, the fluid is very light tan or gold, as with most common brake fluids.
NOTE: In a different vehicle, the same fluid was flushed at about the same time. Flushing that vehicle yesterday, there was no trace of green. The old fluid was a bit darker than new, but that's it.
Flushed the factory fluid on one of my vehicles after 2 1/2 years. It was distinctly darker than new, but just brown. Fast-forward 2 1/2 more years to the next flush. The fluid in the master cylinder, all the calipers, and throughout the lines was green. Probably darkest (not by much) in the master cylinder reservoir, but at least the one caliper was also that dark.
Both 2 1/2 years ago and yesterday the old fluid was also distinctly more opaque (cloudy).
Why did this fluid turn green? Is that just the color they intend for it to turn as it ages and breaks down? When new, the fluid is very light tan or gold, as with most common brake fluids.
NOTE: In a different vehicle, the same fluid was flushed at about the same time. Flushing that vehicle yesterday, there was no trace of green. The old fluid was a bit darker than new, but that's it.