Can I drive by car with an oil leak?

The answer is "maybe", leaking oil that hits the exhaust could start burning and cause an under hood fire that could destroy the car. The best thing would be to determine what is leaking and repair it before taking chances. To find the leak you can start by looking above the oil burning area, then if it's not readily visible you can use a rag to wipe off any dirt and oil. Then start the engine and see if you can spot the leak. From there it may be a simple repair, or not, depending on what the leak actually is.