Very briefly, vinegar cleans and oil prevents abrasion and nourishes the wood furniture. Olive oil, which has color, can slightly darken the wood. If you want to keep the same tone, use sunflower, which is lighter. To avoid all color, replace the oil with liquid Vaseline, but this ingredient will not be common for you to have at home. If the furniture is very dirty, use lemon instead of vinegar. It has a deeper cleaning power.