Kia has been making smart engines for over two decades now. If you happen to be a Kia owner, & specifically have an Optima, this article is for you. Optima engines are known for their longevity. But even the most rugged machines can get worn out with time. In such situations, the owners usually have a dilemma, whether to buy a new one or go for a used engine. Used Kia Optima engine... https://usedenginepart.com/used-kia-engines/