How Fuser Oil Works Your copier is loaded with a toner cartridge, which is housed in the photo-conductive drum. Paper passes through two rollers that are covered with fuser oil and heated; this prevents the toner from sticking to the rollers as they feed paper through your copier. The exact compound of the fuser oil fluid can vary depending on the model of your device and vendor preferences; however, methyl silicone and mercapto silicone are the most commonly used. Placing the wrong fuser oil in your copier could prevent the toner from properly sticking to the paper. More Lubrication Copiers that use fuser oil have increased lubrication, which makes it easier for them to feed paper into the tray after the toner has been applied. This will also reduce the buildup of static electricity, which is the leading cause of paper jams. Extra lubrication will also encourage paper to move back in place if it has been incorrectly loaded, which can result is less waste if your copies come out wrong. Replacing Fuser Oil When fuser oil is low, your prints can come out patchy because the toner won't stick to the paper properly. Fuser oil is poured into the copier itself. The exact process can vary according to make and model. You should pour the oil into the oil reservoir using a plastic spout. Pour slowly to prevent any spillage. Your copier should have a filling gauge; do not exceed this mark. Too much or too little fuser oil can hinder the quality of your prints. Discard both the oil bottle and plastic spout when you are finished. In some copiers the fuser oil is built in to the toner cartridge itself, meaning you don't need to replace the fuser oil separately. Various fluids are used: Methylsilicone fluids of high purity and extremely low VOC content Organic, modified aminosilicone fluids Mercapto-silicone fluids