As the tital says, changing your car’s oil is vitally important. It keeps the many components of the engine working efficiently, and it helps reduce the accumulation of varnish and carbon from collecting on the engine. As you’re aware, the engine can get very hot from the thousands of small explosions taking place every minute; oil helps pull the heat away from the combustion chamber essentially preventing the engine from blowing up. As oil collects heat, varnish and carbons during the course of protecting and keeping the engine running smoothly, it eventually becomes less like liquid and more like sludge. No matter how good the oil is, eventually it degrades as the additives get used up. That’s when you should have your oil changed.
How often and what kind of oil should be used? It will depend on the type of oil you choose to use, what kind of car, and how often you drive. This is where your owner’s manual will come in handy. The old adage suggests every 3 months or 3,000 miles. The amount of mileage you drive is more important than the amount of time. You may go on a road trip and burn through a few thousand miles in a few weeks, or it may take five months before you reach the recommended mileage. Pay attention to the odometer and how you’ve been driving your vehicle. Driving in extreme weather or towing a lot of weight behind your car will affect your oil too.