How big is the gas tank on a 2025 Toyota Sienna?
The gas tank on the 2025 Toyota Sienna is 18.0 gallons (68 liters).
In practical terms, that fixed capacity works with the Sienna’s hybrid efficiency to determine how far you can drive between fills. Toyota’s 2025 Sienna uses a 2.5-liter hybrid powertrain, and the tank size is designed to balance range with payload and interior space across the lineup.
Fuel tank capacity and estimated range
Below are the official capacity figures and expected driving range based on EPA ratings for the 2025 Sienna.
- Tank capacity: 18.0 gallons (68 liters).
- EPA fuel economy (front-wheel drive): about 36 mpg combined (35 city / 36 highway).
- EPA fuel economy (all-wheel drive): about 35 mpg combined.
- Estimated range on a full tank: about 648 miles (FWD) or about 630 miles (AWD) under EPA test conditions.
These figures provide a practical guide for planning trips and fuel stops; actual range will vary with speed, terrain, load, climate and driving style.
Notes on variations
The Sienna’s tank capacity is consistent across trims, but real-world range can vary slightly due to tires, temperature, and driving patterns. EPA estimates are useful benchmarks for planning, but your daily driving habits will affect actual miles per tank.
Summary
The 2025 Toyota Sienna carries an 18.0-gallon tank, which translates to roughly 630–650 miles of driving range depending on drivetrain and conditions. Its hybrid efficiency helps maximize that range, reducing the need for frequent stops on long trips.
