The amount of lubricant required for the engine of a specific vehicle model and year is a critical specification for maintaining its operational health. In the case of the 2021 Toyota 4Runner, this value represents the precise volume of oil needed to ensure proper lubrication of internal engine components.
Using the correct volume is vital for optimal engine performance and longevity. Underfilling can lead to inadequate lubrication and potential engine damage due to increased friction and heat. Overfilling can cause increased oil pressure, potentially damaging seals and other components, and potentially leading to foaming of the oil, reducing its effectiveness. Understanding this capacity ensures the engine operates within its designed parameters, maximizing fuel efficiency and minimizing wear.