Oilers and reservoirs dispense oil or other lubricants directly to machine parts in a drip or stream to help reduce wear and tear on the equipment. They allow the operator to control where the oil goes and the speed of the drip or flow. Oilers, which include handheld can-style oilers, automatic oilers, and powered oilers, are typically used in workshops or factories to lubricate small parts like gears, bearings, and shafts. Automatic-style oilers are a good choice for equipment that loses oil easily, like pumps, fans, and motors. Reservoirs attach directly to machinery and provide a consistent flow of oil or lubricant. They're often used on tractors, heavy machinery, and other large equipment.