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2021 Sienna Limited AWD
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I've been leaving it in Eco mode, no matter what kind of driving. Should I leave it there or normal? Maybe use "Sport" for getting on the freeway?
I've been in Eco mode the whole time since leaving the dealership 2000 miles ago. City/freeway/road trip, all of it in Eco. It seems that when accelerating on the highway it doesn't matter what mode you're in, it just kicks in what you need. I'd imagine the real difference is starting from a full stop. Eco seems to encourage a slow acceleration in EV mode while Sport gave me the instant torque and started the motor right away.
 

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I've been in Eco mode the whole time since leaving the dealership 2000 miles ago. City/freeway/road trip, all of it in Eco. It seems that when accelerating on the highway it doesn't matter what mode you're in, it just kicks in what you need. I'd imagine the only difference is starting from a full stop. Eco seems to encourage a slow acceleration in EV mode while Sport gave me the instant torque and started the motor right away.
Thanks! I've decided to leave it in normal for city, eco for highway, and probably never sport.
 

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I filled up today after a 400 mile road trip and 11 days of driving in town. The tank covered 595 miles with roughly half of it on the highway (two lane 55 - 65 mph speed limits). The computer showed about 50 miles to empty and 38.3 mpg. It took 15.87 gallons to fill the tank or 37.49 mpg. This was run in normal mode with a green engine, now at 1140 miles.
 

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Hi there, I live about half hour north of Pittsburgh. 2021 Sienna XLE + Fwd 3rd tank of gas and pretty consistently getting 25.5 or less. Mostly highway at 80mph. But even babying the gas and lowering top speed 36 mpg is never happening. Also I parked the van Wednesday night with 143 distance to empty and 1/4 tank of fuel. Got in to go to work on Friday distance to empty: Refuel and gas guage on empty. Then it only took 12.3 gallons. This van might be for sale by summer.
 

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Running eco mode, geeking out on driving efficiently on hilly country driving in winter with snow tires. First tank of gas 8l/100km, this one so far 7.7l/100k which is about 30 mpg US. Hoping for better with summer tires and a broken-in engine.
 

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2021 Sienna Limited AWD
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Hi there, I live about half hour north of Pittsburgh. 2021 Sienna XLE + Fwd 3rd tank of gas and pretty consistently getting 25.5 or less. Mostly highway at 80mph. But even babying the gas and lowering top speed 36 mpg is never happening. Also I parked the van Wednesday night with 143 distance to empty and 1/4 tank of fuel. Got in to go to work on Friday distance to empty: Refuel and gas guage on empty. Then it only took 12.3 gallons. This van might be for sale by summer.
Any chance you parked on a slope? I've got another thread about this, would highly recommend calling Toyota Customer Service (or "brand engagement" as they like to be called). I think there's some faulty gas tank stuff going on.
 

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06 Highlander Limited AWD/ 09 Sienna XLE FWD / 12 Highlander SE FWD
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Would switching to a higher octane gas be better MPG-wise relative to the higher cost? My guess is no, but wasn’t sure if it might for the four cylinder engine.
 

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2021 Sienna Platinum AWD
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Discussion Starter #29
We’re getting over 35 mpg now. I think the warmer weather has helped.
 

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Running eco mode, geeking out on driving efficiently on hilly country driving in winter with snow tires. First tank of gas 8l/100km, this one so far 7.7l/100k which is about 30 mpg US. Hoping for better with summer tires and a broken-in engine.
Second tank was 7.5 l/100k
Third was 7.0l/100k with some city driving. Still on snow tires, but it’s warming up outside.
 

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Guys breaking engine doesn't affect economy. It's a myth. Weather, fuel (winter vs summer), traffic, elevation, van weight load and driving style does affect it. it seems like as weather gets warmer and owners get used to drive it efficiently - mpg stabilizes closer to epa mpg numbers and some even surpass it. No matter how you drive, weather or anything else - in gas van you'd be getting at least 10mpg less.
 

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Is there a way to view the historical mpg since day 1 or does it reset each time you clear the mpg?
It'll reset everytime but you can see historical mpg at each time you reset it thru the trip/eco menus in the touchscreen.

To my knowledge there is no way to see a "lifetime" mpg unless you just never reset the overall mpg number.
 

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Thanks. That’s a bummer. The computer should be able to calculate that. Would be nice to have the “lifetime” mpg
 

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Which gas grade has is best for the sienna awd? I’ve only filled up once (premium) and have 630 miles. Is it ok to get the regular unleaded grade gas ?
 

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I have the LE and getting 39 mpg. I’ve had it a little over a month now and live in the Los Angeles area. Mostly city and LA freeway driving. That’s driving normal mode. I don’t turn ECO on at all.
 

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XSE. Still on first tank. Largely ECO mode but mixed in normal and sport. Combo of country roads, highway and city. 34.8 MPG (winter blend). Hope to see a bump come May 1st with Summer blend.
 

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I have the LE and getting 39 mpg. I’ve had it a little over a month now and live in the Los Angeles area. Mostly city and LA freeway driving. That’s driving normal mode. I don’t turn ECO on at all.
How exactly do you drive? You are 10% over EPA MPG! And even without eco mode. In LA.
That's not easy to achieve without hypermiling techniques. Can you post your mpg cluster info? I'm interested in average speed for that mpg you are getting.
 
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