Oil Additives Available here. A long-lasting and healthy engine gives your car a much longer lifespan. To ensure your engine gets the best treatment, choose the best oil additives to go into it. Considered to be especially helpful to older engines, these additives produce more lubrication to your oil to prevent friction and keep your engine from suffering from wear and tear, rusting and the buildup of sludge that can clog your engine. They aid in maintaining the thickness of your engine’s oil so it stays thicker than water but not so thick that it becomes too paste-like, which keeps it flowing at an optimal rate. To keep your car operating efficiently, use the right oil additives when treating your engine.