It's recommended that every 3000 miles or even every 3 months the hinges and knobs of the doors,
Hood and trunk and the latches should be applied with several drops of light oil or lock lubricating oil. Also, the door latch strikers can be lubricated using a thin layer of grease to overcome wear and thus ease the operations. It is also required to grease the door- and trunk locks with the help of the spray-on graphite lubricant.