Every 3000 miles or every 3 months apply a few drops of light oil or lock lubricant to the hinges and latch assemblies on the doors and especially on the
Hood and trunk. Last but not the least, the door latch strikers must be oiled thinly to prevent them from wearing out while serving to make them more responsive. This is also the reason why, it is also recommendable to lubricate the door and trunk locks in a spray of the graphite lubricant.