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Discussion Starter #1
I wanted to start a gas mileage thread like the siennaclub had.

State your engine, Fwd or Awd , City/Highway/Combined mileage and your range on a tank.

Just curious what you other Sienna owners are getting :)

for me:

3.5L
Fwd
18 mpg all city driving
27 mpg all highway
21 mpg combined ( 60% city 40 % highway)

We get about 350 miles to a tank usually but got as much as 450 miles on a recent trip. We were using the A/C on the trip most of the time with cruise set at 70 mph.
 

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2004 XLE Ltd.
3.3L
FWD
~66K miles (20Mar2009)
Tire pressure = 40psi front/rear (yeah...sometimes I get lazy & don't watch it as closely as I should).
A/C is ON 99%+ of the time the car is on.
Windows closed 98% of the time while driving (city/highway). Occasionally open/tilt moonroof and/or open 3rd-row vent windows.

Est 75% city / 25 % highway (includes occasional extended periods of idling).
I stopped paying attention to the range estimate on the trip computer because [spywife] likes it set to the outside temperature. I think it usually hovers around 300+mi. I usually fill the tank before it gets down to approx 1/4 remaining.

Est 95% time with 2 adults + 1 toddler + a lot of gear + Costco-runs/misc shopping.
Est 2% time with 1 adult and forgetting that a Sienna is NOT a Lotus Esprit or Ferrari, etc. :eek: ::) ;D :D 8)
Est 1% time with 3 adults + 1 toddler + a lot of gear & misc shopping.
Est 1% time with 1 adult + misc hauling.
Est 1% time with other configuration/usage.

TRIP COMPUTER
Lifetime
17.3 mpg combined

MANUAL CALCULATIONS
Estimated values
~13ish - ~15ish mpg combined
 

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I just use the console. My 2008 FWD has 21K miles, I just bought it but drive a lot so this is maybe 10 tanks of gas in the last month

straight highway 27-ish
my normal mix of about 70% highway and the rest stop and go city always seems to hit 23.something

When I do my first camping trip I'll post some mpg stats towing a full sized camper. We get 11 w/ my wife's 4runner, which is quite good, so hopefully the Sienna will be as good or better.
 

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08 LE, FWD. Had less than a month.

My wife driving the kids around town. 19.2 mpg off of the computer. Camping trip coming up so we'll have a good amount of highway miles to report on.
 

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2007 LE

50/50 mix hwy/cty

Average 23.04 MPG (10.27 liters per 100 Kilometers) over the last 4000 miles
 

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2004 LE AWD, 3.3L

I usually average around 18mpg mix of city and highway.

Just went on a roadtrip last week and I averaged around 24mpg!
 

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2006 LE 8 passenger
Lifetime trip computer is 22.6
66,000 miles as of 3/09
Avg slightly over 400 miles per tank
Filled up tank with 20.44 gallons a week ago...cutting it close to save .30/gallon...
Avg tank fill is 19 gallons.
Avg about 400+ miles per week. 350 highway, balance around town.
 

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2008 LE 7-pass
9100 miles since 6/20/2008, 28 fill-ups
21.6 overall mpg (calculated by miles traveled/gals used)
21.8 overall mpg (calculated by trip computer)
10% city
70% suburban (one stop every mile or so)
20% highway

Best tank mpg - 32.1 mpg (472 miles) 100% highway, 55mph average
Best tank miles - 535 miles (28.5mpg) 100% highway, 65mph average

Worst tank mpg - 16.9 mpg (227 miles) 20% city, 80% suburban, very cold weather
 

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siennakoko said:
<~snip!~>
Filled up tank with 20.44 gallons a week ago...cutting it close to save .30/gallon...
Avg tank fill is 19 gallons.
<~snip!~>
It's generally NOT considered "good" to let the gas tank get too low. You risk expen$$$ive damage to the fuel pump when it sucks on air instead of refined petroleum products.

We've all done it (too busy & no time to stop, forgot to get gas "yesterday", one person thought the other person went to get gas, didn't have the ca$h on-hand, etc), but to do it regularly is inviting trouble that can be easily avoided.

The 2ndGen Sienna has a fuel tank capacity of 20-21 gals (depending upon whom you ask, and possibly model year). Refilling by approx 1/4-tank ( 5 gals ) remaining may be a better tactic.

YMMV.
Good Luck!! 8)
 

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I ran flat on fumes to empty once on my 2004 Sienna.... never again. Not for the damage on the fuel pump canister but it sucked waiting for AAA on a 100+ degree day in the middle of nowhere on a country side road....it was 2 hrs for road service. Now I carry 2 5gal containers filled with gasoline if I ever go into the boonies.

I average about 17 miles highway and 12 miles in city, combined I dunno! I've got a lead foot.
 

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2008 CE with 35 000 km on it. 3.5L FWD. We live in the country so 90% of our travel is hwy.

I checked the mileage last week:
12L/100km = 20 US MPG = 24 Imp MPG

We traded in our 2001 CE (3.0L FWD) last year and have been dissapointed with the mileage on the '08. The EPA mileage comparison suggested the newer Sienna's would get slightly better mileage. Its been worse. Here's what we used to get with our '01:
10L/100km = 24 US MPG = 28 Imp MPG

Update July 2009. With 44000km, our 2008 CE has been getting 10L/100km = 24 US MPG = 28 Imp MPG the last few fills. However, we generally get better milage in the summer.
 

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2008 Sienna XLE FWD
Mileage: 6340 miles

From this past winter
- avg. per tank full - I always reset the at the pump
- City driving = urban 45 mph avg. stop and go constant
- Highway = 65 - 70 mph constant over 1 tank

100% City (Winter) - 17.8 mpg
50/50 City (Winter) - 21.5 mpg
100% Highway (Winter) - 24.8 mpg
 

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Samilcar said:
2008 LE 7-pass
9100 miles since 6/20/2008, 28 fill-ups
21.6 overall mpg (calculated by miles traveled/gals used)
21.8 overall mpg (calculated by trip computer)
10% city
70% suburban (one stop every mile or so)
20% highway

Best tank mpg - 32.1 mpg (472 miles) 100% highway, 55mph average
Best tank miles - 535 miles (28.5mpg) 100% highway, 65mph average

Worst tank mpg - 16.9 mpg (227 miles) 20% city, 80% suburban, very cold weather
Wow!!! 32 mpg. Congrats! I noticed you included the fact that you drove at a patient 55mph. Cruise control no doubt, and not in a hurry.
I recently got 25 mpg on a mostly highway (60mph) tankful and thought that was pretty good with my '02.
Any secrets to share other than patience?
 

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I didn't really do anything special other than keep the speed down and use the cruise control. Both of those "best" tanks were shortly after we bought the van last year and were on a long vacation trip. The 32 mpg tank was when we first began the trip bright and early at 3AM. Flat rural ground and absolutely no one else on the road, so I didn't have to worry about being an impediment to traffic. This was also back when gas prices had just cracked $4.00/gal, so I had a lot more incentive to conserve.
 

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I have heard folks say that a little moisture in the air can increase mpg's. At 3:00 A.M. there is a usually little dampness.
I share you sentiment about incentive to conserve when gas prices are high.
I normally try to drive just under 60 mph. The tires stay cooler and I think they may last longer. I stay to the right on the highway and am less stressed too.
 
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