What’s black, white, and red all over? If you said, “my driveway,” then your car may be leaking…something. But what, exactly, is that hideous pool of liquid?

Don’t go dipping your pinky in a puddle of driveway-goo. There’s an easier way to figure out what your car is leaking; unless you’re colorblind, you can probably identify car fluid drips by eye. In fact, you don’t even need a particularly well-trained eye to get to the bottom of a car leak, as there are only a handful of fluids that could be the culprit.

Dark or Black Fluid Leaks

Brown, amber, or black fluids, especially when sludgy or thick, usually indicate an engine oil leak. (The smoking gun is if soaks into the ground and stains it black.)

Cars can leak oil – this is just a fact. Typically, a little drop of engine oil is not serious enough to warrant a trip to your auto mechanic. Your car’s oil may seep out of your oil filter’s gasket or seal if it’s not fastened well enough. Apply some elbow grease and you should be good to go.

However, drips can be a sign that something is awry under your car. If your car continues to leak oil, you could have a punctured oil pan, faulty oil filter, corroded drain plug, or any number of damaged car parts. A visit to your auto service center or a local oil change shop should set you straight.