Slow Leak Coming Out of Frame Rail

[Northern]

just based off how bad the paint looks around it, I imagine it's brake fluid.

Could be a leak from the brake or clutch master cyls, either dripping down the inside of the firewall or the outside.

[AmosCake]

What does the fluid smell, look and feel like? Where along the frame rail is it? Post pic w/t wider frame for reference. Your choices are oil, ATF (power steering), condensation, or coolant

honestly looks like brake fluid or oil it’s amberish in color

[82eye]

e30 speed sweat ..

[Gk-89E30]

What does the fluid smell, look and feel like? Where along the frame rail is it? Post pic w/t wider frame for reference. Your choices are oil, ATF (power steering), condensation, or coolant

[AmosCake]

Any one have an idea where this leak is coming from? Its super slow, maybe a drop every 3 days. The interior is super dry. I cleaned the engine bay and around all the lines and drain and fluid still leaks out of that drain hole.