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Can anyone give me a clue?

My Honda Civic had a brake alert few weeks after first servicing in a licensed garage.
when towed to the garage, they found the braking system is totally out of order, presumabl because of wrong brake fluid

I sent the fluid for analysis, and hte results are that some motor oil got in. I am sure it was done mistakenly at the garage, when someone added motor oil instead of brake fluid, to make up hte level.

THe garage claims this could not have happened, becasue hte car would stop imediately; I think that if they added only a little motor oil (enough to make up for hte loss, but not a total changeover) hte harmful result of motor oil in the brake system would appear only after several weeks, and several cycles of fluid recycles.

can this be?
how can I prove it?
thanks - Awad.

 
Rep Power: 217

Wait. Someone put motor oil in the brake fluid reservoir??!?!? That isn't good, dude. I've never heard of such a thing, but I'd assume that because the oil is thicker, it would clog up the lines. Usually when that light comes on, the fluid is either low or the disc brake pads are getting to the end of their life.
It's gonna be tough to prove.

 
Rep Power: 291

If you're looking for a lawsuit, it's gonna be pretty hard to prove

But if I were you, i'd just flush the system a couple times

 
Rep Power: 367

Garage? ...
I suppose you went to canadian tires?

 
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It could be cavitation. I'm by no means a master mechanic when it comes to cars or any piece of equipment in general. But, contaminants are the number one cause of cavitation, and that will flat eat a piece of steel, down to nubs. The tiny contaminants cause rough spots on metal surfaces that attract tiny air bubbles. The air bubbles will eat up said part. Its seen often with boat wheels. Smack the concrete with the wheel once putting it on the trailer, and that creates wear, which gives a foothold for the fluid to start pushing on... The same principle applies to anything hydraulic. You would have no luck in proving it, but google cavitation, and see if you see anything familiar. Just a thought...