I recently bought a 1990 Miata with 15,000 original miles. The clutch fluid keeps leaking, but it doesnt leave any spots on the ground. Anyone know what might be wrong?

 

Check the floor mat on driver side for spots of fluid. The cylinder behind clutch pedal mechanism has a rod and boot inside car if a typical clutch set up.

 

you also want to check the master cylinder, if the plunger in it is worn or cracked, you will leak amounts of fluid that may not be seen on the ground. I had this problem in the past, and it is a relatively cheap fix yourself, and not very time consuming.