The 2015 Toyota Sienna 2WD with its 3.5L V6 gets 21 MPG combined. No one buys a Sienna for its fuel efficiency; they buy it for its ability to haul eight passengers, its reliable reputation, and its minivan practicality. The fuel economy is simply the price of admission.

City and highway performance

The Sienna’s EPA estimates of 18 MPG in the city and 25 MPG on the highway reflect its purpose. City driving, with its constant stop-and-go, is where the Sienna’s weight and relatively simple six-speed automatic transmission use more gas. The highway figure is more palatable, showing that steady-state cruising allows the V6 to operate more efficiently. But even on the open road, a fully loaded Sienna with a family and luggage won’t come close to hybrid sedans. The problem isn’t necessarily the engine itself, but rather the Sienna’s weight and boxy aerodynamic profile.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 Toyota Sienna 2WD at $2,100. This figure is based on driving 15,000 miles per year and using national average fuel prices. Keep in mind that this is only an estimate, and your actual fuel costs will depend on your driving habits, the type of driving you do (city vs. highway), and the price of gasoline local to you.

Real-world expectations

While the EPA estimates provide a benchmark, real-world fuel economy for the 2015 Sienna can vary considerably. Owners reporting their own figures suggest averages somewhere between 17 and 23 MPG in mixed driving are more typical. Aggressive driving, frequent short trips, and consistently carrying heavy loads will push the MPG figure to the lower end of that scale. Careful, conservative drivers who prioritize highway miles may nudge it towards the upper end. Remember that ambient temperature, tire pressure, and even the grade of gasoline used can influence fuel consumption.

How it compares

Compared to other minivans of its era, the 2015 Sienna’s fuel economy is roughly on par. A 2015 Honda Odyssey, for example, achieves an EPA-estimated 19 MPG city and 28 MPG highway, for a combined 22 MPG, a slight edge over the Sienna. The Chrysler Town & Country, another competitor, delivers an EPA-estimated 17 MPG city and 25 MPG highway, resulting in an equal 21 MPG combined. More modern minivans, particularly those with hybrid powertrains like the Chrysler Pacifica Hybrid (82 MPGe combined, 32 MPG combined on gasoline only) demonstrate the significant gains in fuel efficiency achieved over the past decade. For buyers prioritizing fuel economy, exploring newer minivan options or even three-row SUVs becomes important. However, for those focused on the Sienna’s specific blend of attributes, the fuel economy trade-off is often deemed acceptable. See SIENNA MPG across all years to compare with other years of the Sienna line.

Tips to maximize efficiency

First, keep your tires properly inflated. Underinflated tires increase rolling resistance, which forces the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate them to the pressures indicated on the sticker located on the driver’s side doorjamb.

Gentle acceleration and braking techniques can also improve fuel economy. Avoid sudden bursts of speed and anticipate traffic flow to minimize hard braking. The Sienna’s V6 offers ample power, so using it judiciously will save fuel.

Reduce unnecessary weight. Remove any items from the vehicle that you don’t need to carry on a regular basis. Extra weight puts a strain on the engine and reduces fuel efficiency. Evaluate the contents of your glove compartment, trunk, and any storage compartments.

Consider using cruise control on the highway. Maintaining a consistent speed can help to optimize fuel efficiency, however be mindful of the terrain. Cruise control may not be as efficient on hilly roads.

Finally, ensure that the vehicle receives regular maintenance. A well-maintained engine runs more efficiently. Follow the recommended maintenance schedule in your owner’s manual, including regular oil changes, air filter replacements, and tune-ups. You can find all Toyota fuel economy data on our site.