What is a common effect of using improper oil types during an oil change?

Using improper oil types during an oil change can lead to engine sludge buildup, which is a significant concern for engine health and performance. Different engines require specific oil viscosities and formulations to operate efficiently. If the oil does not match the engine's specifications, it may not properly lubricate engine components, leading to overheating and the eventual breakdown of the oil. This breakdown can cause the oil to thicken or form sludge, which accumulates in the engine, clogs passages, and can impede the normal flow of oil. Over time, this buildup can lead to reduced performance, increased wear on engine parts, and may even result in severe damage or engine failure. Proper oil choice is essential for maintaining engine cleanliness, performance, and longevity.