You cant go by a static test, the operation of the MC is anything but static, step on the brake pedal with the cap off. Stuff gets mixed up in there every time you apply the brakes and it only take a minuscule amount to cause damage.
1 ounce of fluid in the reservoir is not going to be sucked down into the MC.
Moisture is a b****.
You know what, getting significant oil in the brake fluid, is going to be noticed quickly, if anything happens at all. So if it has not done anything in a week of time to the system, then nothing untoward is going to happen months forward in the future. Common sense should prevail, not panicky feelings. I go by what the thread starter SAID, and said it was an ounce, meaning a small top off of the reservoir was done. IT WILL NOT MIX, suck it out and refill with brake fluid. Better to do that, then do it again in a day than flushing the whole system. If you flush it down then your certain to get some ATF going into the system. Suck it out, use a paper towel dry it out, then refill.
moisture is not a problem and rarely causes brake system failures.
Oh no it doesn't.....Just did an ins. job on a newer wrangler a few weeks ago.....another shop topped up her brake fluid with ATF, and within just over a week, she had a very low pedal. Master was completely screwed, and it got all parts replaced with rubber. Ins. insisted all parts be replaced, not that we would do it any other way.
Common sense dictates to empty the reservoir first before flushing it through.
