I had my oil changed earlier this week, the people there told me my "clutch fluid" was low. On my first trip after the oil change (2 hour round trip) my clutch started acting weird, it wouldn't pop all the way back out. It worked enough to change gears, but I eventually drove the rest of the way home in 4th gear for fear of messing something up.
At a stoplight close to home, I had to push the clutch, and it hit the floor and didn't pop back up. I was also not able to easily remove the car from gear and it stopped right there.
I have never heard of clutch fluid before, so that sounded odd and I don't see much online about it either. I would have thought they were joking had it not been for my immediate car trouble with the clutch.
Is it normal for a clutch to run low/out of fluid or is this evidence of a potentially much larger and more expensive problem?