How big is a Toyota Sienna gas tank?
The current Toyota Sienna’s gas tank holds about 18 gallons (68 liters). The exact capacity can vary slightly by model year and trim, but 18 gallons is the standard specification for the latest generation.
Current-generation capacity
The 2021–present Toyota Sienna, which uses a hybrid powertrain, is equipped with a fuel tank of 18.0 gallons (68 liters). This size complements the vehicle’s hybrid efficiency, which is typically in the mid-30s miles per gallon combined depending on trim and driving conditions.
Impact on driving range
With roughly 18 gallons of capacity and EPA-estimated mileage in the mid-30s mpg, the theoretical driving range on a full tank is around 650 miles under ideal conditions. Real-world range varies with speed, terrain, cargo load, and climate-control usage.
Historical context by generation
Gas-tank sizes have varied across the Sienna’s generations. Earlier, non-hybrid models tended to carry somewhat larger tanks, typically in the vicinity of 19–20 gallons, reflecting different design priorities before the current hybrid-focused approach. If you need an exact figure for a specific year, check the official spec for that model year.
Practical considerations
To maximize range and fuel economy, keep tires properly inflated, follow routine maintenance schedules, and plan fills around long trips. Refueling before the tank is completely empty is common practice for many drivers, especially when traveling through areas with sparse service stations.
Summary
In short, the latest Toyota Sienna generally comes with an 18-gallon (68-liter) fuel tank. This size supports its hybrid efficiency while providing a solid driving range. Across earlier generations, tank sizes varied, with some models offering slightly larger capacities. For precise planning, verify the exact specification for your specific model year and trim.
How many gallons is a Toyota Sienna gas tank?
A Toyota Sienna's gas tank capacity is 18 gallons for most recent hybrid models, starting around 2021. For older, non-hybrid models, like the 2018 and earlier generations, the tank capacity was 20 gallons.
| Model Year(s) | Fuel Tank Capacity |
|---|---|
| 2021-2026 | 18 gallons |
| 2017-2020 | 20 gallons (AWD) |
| 2018 | 20 gallons |
| 2016 | 20 gallons |
| 2008 | 20 gallons |
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How big is the gas tank on a 2015 Toyota Sienna?
The 2015 Toyota Sienna has a fuel tank capacity of approximately 20 gallons. It uses regular unleaded gasoline and requires a 79-liter (approximately 20-gallon) tank.
- Capacity: 20 gallons
- Fuel Type: Regular unleaded
- Metric Equivalent: 79 liters
How big is the gas tank on a 2017 Toyota Sienna?
The 2017 Toyota Sienna has a gas tank capacity of approximately 20 gallons. This holds true for both front-wheel drive and all-wheel drive models.
- Fuel tank size: 20 gallons
- Fuel type: Regular unleaded V-6
- Engine: 3.5L DOHC V6
- Transmission: 8-speed automatic
How far can a Toyota Sienna go on a full tank?
A Toyota Sienna can go between approximately 630 to 648 miles on a full tank, depending on the drivetrain. Front-wheel drive (FWD) models can travel up to an estimated 648 miles, while all-wheel drive (AWD) models have a slightly lower estimated range of around 630 miles. These estimates are based on the vehicle's 18-gallon fuel tank and its hybrid fuel economy.
- FWD models: Up to an estimated 648 miles
- AWD models: Up to an estimated 630 miles
Important considerations:
- Actual range will vary: Factors such as driving style, road conditions, weather, and vehicle load can affect your actual mileage.
- Hybrid efficiency: Modern Siennas are hybrids, which helps them achieve this high range with an 18-gallon tank and an EPA-estimated 36 MPG for city and highway driving on FWD models.
