Why oil slow about draining back into pan after changing oil?

Oil may drain slowly back into the pan after an oil change due to several factors, including the viscosity of the oil, the design of the oil passages, and the presence of any residual oil or debris that could obstruct flow. Thick or dirty oil can create more resistance, slowing the drainage process. Additionally, if the oil filter is full or if there’s a blockage in the drainage system, it can further impede the return of oil to the pan. Ensuring proper drainage techniques and using the correct oil type can help improve the flow.