The recommended lubricant viscosity for Toyota 4Runner engines is a crucial factor for optimal performance and longevity. Specified by the manufacturer, this characteristic refers to the oil’s resistance to flow at varying temperatures. For example, a common recommendation might be 5W-30, indicating its flow properties in both cold (5W) and operating (30) conditions.
Selecting the appropriate grade is vital for ensuring adequate engine lubrication across different climates and driving conditions. Using the recommended lubricant helps to maintain efficient oil circulation, reduce friction between moving parts, and facilitate effective heat dissipation. Historically, manufacturers have refined their lubricant recommendations based on advancements in engine technology and oil formulations.