It comes in a 3 quart container! It is designed to replenish TBN,AW, and anti-corrosive propertys of an oil. They sell it at Walmart. I woundering if anyone had tried it? I do not have any vechiles that use any oil so I would not be able to try it! I belive the idea if to add this product in lew of oil as the vechile consume some oil. It extended the change interval.