TLC stands for the tender loving care, and it is what you should give your car. You need to follow a schedule to keep your car in good shape. Inspect the vehicle at least once a week to make sure that everything is working properly. Change the oil filter every 3,000 miles or three months. Use motor oil specified by the manufacturer of your vehicle. The oil must be changed when the engine reaches 2/3 full capacity so that there will be enough oil left to lubricate.