The fuel specification for Toyota 4Runner vehicles generally mandates unleaded gasoline. The specific octane rating recommendation can vary depending on the model year and engine configuration. Consulting the owner’s manual or the fuel filler door label provides the precise octane requirement for a particular vehicle.
Adhering to the manufacturer’s fuel specification ensures optimal engine performance, fuel efficiency, and longevity. Utilizing the correct fuel grade can prevent potential engine knocking or damage, contributing to lower maintenance costs over the vehicle’s lifespan. The recommended gasoline type is a critical factor in maintaining the vehicle’s emission control systems and ensuring compliance with environmental regulations.