2025+ (6th Gen) Toyota 4Runner Fuel Type & Tank Capacity

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(Reference: 2025 Owner’s Manual, pg. 617)​

Link to Owner’s Manual: 2025 4Runner Owner’s Manual

Understanding your 2025 Toyota 4Runner’s fuel type and tank capacity is essential for ensuring proper maintenance and performance. This section covers the fuel requirements, tank capacity, and tips for maintaining optimal fuel efficiency.

Fuel Type​

The 2025 4Runner requires premium unleaded gasoline with an octane rating of 91 or higher for optimal performance. While regular unleaded gasoline (87 octane) can be used in an emergency, using premium fuel is recommended to achieve the best engine performance and efficiency.

• Recommended Fuel: Premium Unleaded Gasoline (91 or higher octane)
• Alternative Fuels: The vehicle is not designed to run on ethanol-based fuels (e.g., E85) or other non-recommended fuel types. Always ensure you’re using the correct fuel to avoid engine damage and ensure proper vehicle operation.

Tank Capacity​

The 2025 4Runner has a fuel tank capacity of approximately 23.0 gallons (87 liters). This capacity provides a good range for long-distance driving and off-road adventures.

• Fuel Tank Capacity: 23.0 gallons (87 liters)

Fuel Efficiency Tips​

To maximize fuel efficiency and get the most out of each tank, here are a few tips:

1. Drive Smoothly:
   Avoid rapid acceleration and hard braking to maintain optimal fuel economy. Smooth driving helps improve gas mileage and reduces wear on the engine.
2. Regular Maintenance:
   Keep your 4Runner well-maintained by following the manufacturer’s recommended maintenance schedule, including regular oil changes, air filter replacements, and tire rotations. A well-maintained vehicle is more fuel-efficient.
3. Check Tire Pressure:
   Ensure your tires are properly inflated to the recommended pressure. Under-inflated tires increase rolling resistance and reduce fuel efficiency.
4. Use Cruise Control on Highways:
   When driving on highways, use cruise control to maintain a constant speed, which can help improve fuel efficiency.
5. Avoid Excess Weight:
   Extra weight, especially in the trunk or roof rack, can decrease fuel economy. Remove unnecessary items when not in use.

2025+ (6th Gen) Toyota 4Runner Fuel Type & Tank Capacity Diagram​

Refer to page 617-619 of the Owner’s Manual for detailed diagrams showing the fuel door and the recommended fuel type.