21 MPG combined won’t win any efficiency contests, but it’s the reality for anyone needing the unparalleled space and practicality of the 2020 Toyota Sienna 2WD with its reliable 3.5L V6. This isn’t a vehicle purchased for its mileage; it’s chosen, almost exclusively, by families who prioritize seating for seven or eight, easy access for kids and car seats, and the legendary reliability that Toyota has built for decades. Fuel economy is a secondary consideration, a cost of doing business when your business is hauling a small army.

City and highway performance

The EPA estimates of 19 MPG in the city and 26 MPG on the highway accurately reflect the Sienna’s behavior. The V6 pulls strongly from a standstill, but the weight of the van and the gearing of the eight-speed automatic transmission conspire against truly impressive city fuel economy. Stop-and-go traffic will always be its downfall. On the open road, however, the Sienna settles into a comfortable cruise. At highway speeds, the engine is relaxed, and the aerodynamics, while not groundbreaking, allow for a respectable 26 MPG. Drivers in suburban environments with a mix of highway and residential driving will likely see numbers closer to the combined rating, or possibly even a touch higher depending on driving style.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Toyota Sienna 2WD at $2,100. This figure is based on driving 15,000 miles per year and using national average fuel prices. Of course, actual costs will vary based on individual driving habits, local gas prices, and the grade of fuel used. While the Sienna doesn’t require premium fuel, using higher octane gasoline won’t improve the mileage noticeably enough to justify the added expense. This estimate provides a baseline for comparison with other vehicles in its class. You can explore all Toyota fuel economy data on our site.

Real-world expectations

While the EPA estimates provide a standardized baseline, real-world MPG can vary. Aggressive acceleration, frequent short trips, and heavy loads will all negatively impact fuel economy. Conversely, smooth driving, consistent highway speeds, and proper tire inflation can help drivers achieve numbers closer to, or even slightly exceeding, the EPA estimates. Owners who track their fuel consumption often report a range of 17-24 MPG in mixed driving conditions. Older Siennas had notoriously poor fuel economy relative to newer minivans, and research SIENNA MPG across all years for more information. Remember that driving style is a dominant factor here.

How it compares

The Sienna’s closest competitor, the Honda Odyssey, offers a statistically similar EPA combined rating of 22 MPG with its V6 engine. The Chrysler Pacifica, particularly the gasoline-only models, mirrors this range as well, achieving around 22 MPG combined. However, the plug-in hybrid version of the Pacifica significantly outperforms the Sienna, offering substantially better fuel economy with its electric capabilities. For families primarily concerned with minimizing fuel costs, that hybrid powertrain represents a worthwhile alternative. The Kia Sedona, another contender in the minivan segment, lags slightly behind, generally falling in the 18-24 MPG range depending on driving conditions. The Sienna’s slightly lower MPG might be acceptable to buyers prioritizing Toyota’s renowned reliability over marginal fuel savings.

Tips to maximize efficiency

First, anticipate traffic flow and avoid sudden acceleration and braking. The Sienna’s weight makes it fuel-inefficient during quick starts, requiring more fuel to get up to speed. Gradual acceleration and smooth braking will conserve considerable fuel over time and minimize wear and tear on your brakes.

Second, maintain proper tire inflation. Underinflated tires increase rolling resistance, which directly impacts fuel economy. Check your tire pressure regularly, ideally every week, and inflate them to the manufacturer-recommended pressure listed on the doorjamb sticker. This is a simple but effective way to optimize efficiency.

Third, minimize unnecessary cargo. Extra weight impacts fuel economy, especially in a vehicle as large as the Sienna. Remove any unnecessary items from the van to reduce the load on the engine. This includes everything from sports equipment to tools to rarely used items from the third row cargo area.

Fourth, use cruise control intelligently on the highway. Maintaining a consistent speed will help to optimize fuel economy. However, be mindful of hilly terrain, as cruise control may downshift frequently, negating some of its benefits. In these situations, manually adjusting your speed might be more efficient.