Brown Sludge in Wiper Fluid? : r/MechanicAdvice

Windshield washer fluid - Wikipedia

Washer fluid in Oil mistake [emoji15] - MX-5 Miata Forum

Rust in coolant? : r/MechanicAdvice

Brown Sludge in Wiper Fluid? : r/MechanicAdvice

Brown sludge scum in coolant bottle.

Green stuff looks like corrosion that you'd find on battery

Is this much sludge inside the valve cover normal for a 187k mile

Orange Sludge in Coolant : r/MechanicAdvice

Customer states they topped off their washer fluid with… oil. : r

What the heck is this gunk under my radiator cap??? : r/MechanicAdvice

Customer states they topped off their washer fluid with… oil. : r

A friend borrowed my car and put water in the tube with the blue

One is windshield washer fluid, one is Powerade, can you tell the