A lot of fluid that allows your car to run safely, smoothly and efficiently unlike fluid that allows your body to do the same. If the fuel in your car is very much like the blood that runs in your body and allow you to live your life, then it can be considered a liquid oil synovial. If this sounds underwhelming, then remember that the synovial fluid is a substance that allows the knees, elbows and other joints to move as they do, prevent the bones from rubbing against the cartilage, and other types of contacts you will make walking, running, crouched, stretching or almost all human activities are unbearably painful in the first case and, lately, completely impossible. Without engine oil, your car will end up being completely useless.
If, then, is your car leaking engine oil, this is a situation that requires immediate attention. The leak could not have come to your attention right away, but if it doesn't will usually thanks to dark, greasy footprints inside and around your garage leading into your home. As the liquid is most widely used in cars that is oily in nature, leaks may not be the engine oil, so it is worth testing it with a pick and drop the drip some liquid onto a sheet of white paper. If it turns red, you may have a transmission fluid or power steering fluid. Windshield washer fluid is blue, while the anti-freeze can be a variety of different colors. If it appears black or brown color, chances are that it is the engine oil. It could be the power steering or transmission fluid, as this turns black or brown quickly when in contact with oxygen. Check the fluid reservoir for the second, and if they're running low, then they may be the culprit.
If they are at a normal level, then you have an engine oil leak. If the puddle which is directly under the engine in your car can be found, it is definitely the engine oil. Please look on the engine under a bright light. If you're lucky, you'll see the leak soon and be able to decide on a plan of action. If not, you will need to wash the engine with engine cleaner, follow all the instructions on the can, and look again.
The leak should be clearly identified after a brief spell of driving. At this point, it is for you to decide whether you need a garage to come in and repair the damaged area of the machine or whether you can do the maintenance yourself. With the right parts and tools, you can probably do it myself, but it doesn't do anything unless you are sure that a) you replace the right thing and b) you get it right. Engine maintenance unnecessary or poorly-done can endanger the machine and Your bank balance – and for your own safety, is more important. If in doubt, ask a professional-it may cost a little more up front, but You can't give prices on safety.