Every driver can relate to the sinking feeling of dread when seeing a pool of unknown fluid coming from their vehicle. Cars do leak from time to time, and being able to identify the fluid will help you in diagnosing the problem.
One of the most common leaks you’ll see in the summer isn’t really a leak; condensation forming on your air conditioning system will drip after your car is parked, sometimes forming a puddle. However, if you see a puddle of green or orange fluid, this is most likely coolant and indicates an issue with your radiator if it happens repeatedly.
If you spot an oily, smelly substance near the middle or rear of your vehicle, this may be differential fluid. Similar but probably more recognizable to the average driver is motor oil. This is one of the most common leaks of all, dotting driveways across the country.


