I learned that lesson years ago with my previous Miata.

Somehow the guy changing the oil managed to loosen the oil pedestal rather than just take off the old filter.

When I got home, the car was dumping oil on the floor. The mgr claimed it could not be their fault. Right. I didn't leave until they fixed it.

So, don't let little brothers or quick lube jockeys touch your FD.

 

like some of the people here are saying flushing the brake system will not i repeat will not be the smartest choice, i dont know you but i still dont want to hear you got hurt cuz of some bad advise, you could have taken out the fluid out of the reservoir before you drove the car, but after 1000 mile like you said there is definitely damage to some brake components, some said that your brakes will lock up i guess its not as bad as your brakes not working at all, cuz either one of those could happen.

 

similar thing happened to a friends lumina when he took it in for a tune up.
they accidently put in a little bit, and it ended up destroying the entire brake system.
i would reccommend changing it all if you can afford it. better yet, make your brother afford it,

 

use a vacuum bleeder or turkey baster or similar to suck out all the fluid out of the reservoir. then fill back up with fresh brake fluid. then use said vacuum bleeder to perform extensive bleeding of all brake lines, starting with furthest from master cylinder.

 

I can't believe after this like http://www.herguth.com/capabilities/brakeswell.htm and all the REAL mechanics, and people with experience telling him to replace every rubber component of his brake system, people like you are still telling him to just flush it and he'll be fine.

You going to tell his mother the same thing when she picks chunks of his skull and brain out of a tree because of your rotten *** advise?