Your car's oil needs to be changed on a regular basis to preserve the life of your vehicle.
You will have to make sure the oil is changed regularly because your car's engine has an oil filter, which is responsible for storing any harmful content that may come from your engine - this too needs regular maintenance.
Think about it this way - how would you be able to live without functioning liver and kidneys? Your body will be sure to bog down to numerous illnesses, as the two aforementioned parts keep impurities away from your blood - so what's to do if they're not working?
As you can see, oil serves the same purpose for your vehicle as blood does to the human body. In order to keep your car operational, it will need clean oil. So what's to happen if you forgo the whole idea of oil change all together?
Well, you'd be lucky to get 30,000 miles out of the car before your engine would collapse.
Now let us assume you only do annual oil changes. "Oh, my car's running fine", you'd probably say after you notice this. Hold the phone. Your engine has been flooded with contaminants. Don't say we didn't warn you if your car breaks down in a couple months, or even weeks.
Here's something gross, but nonetheless true - think of oil changes as your car's equivalent to heeding the call of nature. Yes, we know it sounds icky, but it's still a valid analogy. This one scheduled maintenance may help your vehicle avoid mechanical failures.
Back when I was in high school, I overheard two mechanics from my area talking about changing oil every 2,000 miles as a way to keep a car running for years. Yes, I know it sounds like too much work. But guess what - my '64 GTO is still running good as new, and you know how it is with classic muscle cars.
You'll have to get your car checked at a service station ASAP if you see oil leaking on your driveway after parking your car. We don't mean to scare you, but this could be a cause for panic - don't hesitate in having your car inspected. Be alert as well if you smell smoke coming from the engine area!
You may not feel 100% comfortable changing your oil, but you can check it easily. Make sure the engine is cold before checking your oil. Unscrew the cap and pull out the dipstick. Wipe the stick with a clean piece of paper or a towel. Reinsert the dipstick completely. After that, pull it out and check it again. Look for the two lines that indicate "add" and "full". If the oil film is between the "add" and "full" lines, you're good. A quart of oil will need to be added if the oil film is anywhere below "add". When in doubt, the manual is always there to point you the right way. After adding the oil, repeat all the steps.
Once you get used to it, it will be just like tying your shoe laces.
In summary, you would need to find enough time to replace your oil and check the levels before doing so. It literally means the difference between life and death for your vehicle!