Today, traditional oil seals have to compete with a new variant oil seal, which is used in most modern engines.
Moreover, with the rise of electric and hybrid vehicles, the role of spark plugs is evolving. In some hybrid models, spark plugs are used during specific driving conditions to augment the efficiency of the gasoline engine. This showcases the adaptability of spark plug technology to changing automotive trends.Figure 2: Typically shaped oil seal and component nomenclature