Oil provides lubrication to the engine alleviating friction, as well as wear and tear, internally. It also acts as a cooling agent for the engine while absorbing particle debris from the combustion process. Those particles are then filtered out of the oil through the oil filter. Maintaining clean oil and proper oil levels in the car will ensure that the parts of the engine don't wear out faster than they should. Scott's Auto Center recommends changing the vehicle's oil every 3,000-5,000 miles, depending on driving. This mileage amount may change for electric-hybrid vehicles.
The Air Filter on your car cleans the air entering the engine. The Air Filter keeps out bugs, dirt, road debris and other contaminants such as chemicals emitted from the engine. Scott's Auto Center recommends to have the Air Filter changed every 10,000-15,000 miles, or at least once a year.