15w40 oil from leading brands. We select our oil manufacturers carefully to ensure that all products meet API and ACEA requirements, and is very high quality. Oil is used in your car to lubricate the moving parts of your engine, from the time you turn the key til your journey is finished. This prevents friction from causing damage and wear and tear on the components of your vehicle. Oil also cleans the engine and cools it as it circulates around. It is important to use the grade of oil recommended by your manufacturer to ensure that these tasks are all performed to a high standard and to avoid costly engine damage. This, along with regular oil changes and other maintenance tasks will keep your car running happily for years.