Last post on Sep 27, 2010 at 10:42 AM
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Toyota Sienna, Van
#201 of 250 recent trip milage
Jul 13, 2008 (12:58 pm)
05 LE, package #8. It has 35K on it right now and new Yokohama Avid TRZ's (very sweet tires). We just got back from a week long trip to Cooperstown, NY from Columbus, Ohio. Total milage from driveway to driveway, 1367.2. Total fuel used, 53.872 gallons. Total MPG for the trip, 25.38mpg. Fully loaded both ways, family of 4, lots of luggage, I removed one of the middle captain chairs, I usually do for trips. I also removed my luggage rack cross bars a while ago, as they are never used. My tires always stay at 41 lbs. For the trip there, I went from 57 to 64 mph most of the way, there was a spell when I was going around 72-74 for about 40 miles. While in Cooperstown for the week, I averaged 21 mpg. The most impressive part of the trip was the return. I gassed up just after I got on I-90 and went 495.5 miles on 17.36 gallons = 28.54 mpg. On this part of the trip I was on CC at 63 mph for 90% of the time. Some things I noticed about going a bit slower than I normally have in the past, you will see many of the same vehicles pass you more than a couple times in a big hurry. I was not nearly as fatigued as I was relaxed watching cars pass me all the way instead of hurrying and always trying to find the open lane to keep moving at speed to my destination. Also, you never have to constantly look ahead for cops taking radar. I rather like going between 60 and 65, it still gets you there in good time and these Sienna's just love that speed for efficiency. I'm sure I could get over 30 mpg going a steady 55, but that is just anti-social and kind of dangerous as well.
I forgot to add, that AC was used for about half of the trip. AC was used every day while in Cooperstown, city driving and most of the second half of the drive back to Columbus. All in all, I'm very impressed with Sienna's performance. It delivers a quiet ride , lots of room for "stuff", entertainment for the kids, (never heard a peep out of them, well except for the laughter while watching movies), just a very balanced vehicle and I'm glad this one is mine.
#202 of 250 2004 AWD Sienna Trip Computer
Jul 13, 2008 (11:08 pm)
hi new to the forum. Our trip computer consistently shows about 2 mpg above what the actual mileage really is by doing the math. Speedo is GPS verified as accurate for both speed and distance. The trip computer seems to be "programmed"to always show the "optimistic" old EPA numbers. Anyone else have the same problem? Thanks
#203 of 250 Compute milage display
Jul 14, 2008 (1:20 pm)
We have an 04 Seinna and the milage on the overhead display is 2-3 mpg higher that what we get. I wonder if they can be reprogrammed?
#204 of 250 Re: Compute milage display [kermie]
Jul 15, 2008 (10:10 am)
Thanks, yea I wonder. Interesting thing is the miles to empty (usually round 300 for a full tank) is always dead on; ie. the trip computer "knows" the actual fuel mileage but displays 2 mpg more. is this deliberate ? so consumers dont have to see the awful truth of 16 mpg? ours is a awd 04 Sienna is this just a AWD problem ?
#205 of 250 Re: Compute milage display [dnbqee]
Jul 30, 2008 (12:40 pm)
My trip computer is accurate (2007 LE FWD). I've measured on my own (miles for the tank/gallons to full) and it's only been off by 0.1 or 0.2 mpg, and not always reading high, either.
Loaned the van to my lead-footed brother and he "discovered" the 266hp V6. 23.3 mpg.
#206 of 250 XLE fwd mileage display
Aug 11, 2008 (7:03 am)
We just bought the car this last saturday. We are getting, based on the mileage display in the car, 22mpg in 50/50 mixed driving. How close is the display to actual mileage anyways? I should probably try the search feature...
#207 of 250 Re: XLE fwd mileage display [dwarfl0rd]
Aug 11, 2008 (9:12 am)
Mine is pretty accurate, usually within 1/10th of an MPG.
Just got 24.9 mpg in mine doing about 50/50 city highway.
So far this tank it says 25.6mpg from mostly highway, but I was stuck on the Chesapeake Bay Bridge last night in that traffic since that tractor trailer drove in to the water (wild).
#208 of 250 Trip computer vs Odometer vs GPS
Aug 11, 2008 (9:45 pm)
My family and I just returned to San Jose, CA from visiting family in Arizona in our new 2008 Sienna LE. I took along our new Garmin Streetpilot C580 to help us along our way.
One finding was that the odometer read 4.5% less than the GPS. This was confirmed in two ways. First it was noticed that in the "next turn" estimates that the turn would come up sooner that I expected looking at the odometer so I started marking the odometer readings with the next turn at 100 or 150 miles. This method indicated that the odometer read 95.6% of the GPS distance Later I discovered the trip meter function on the GPS and reset it and one trip odometer for the leg home. Over a GPS indicated distance of 1075.4 miles, the odometer read 1025.1, or 95.4% of the GPS.
Because of this disparity I have three estimates of the MPG.
Trip computer: 25.3
This is 2056 miles of driving on a van that only had 330 miles at the start of the trip. It is about 90% highway and 2 or 3% unpaved roads. Most of the time we were running 75 MPH through 100+oF desert (as high as 112o at one point) with the A/C running full blast. For a vehicle with this much weight and power I am impressed by even the lowest MPG estimate. The A/C can make the whole van cold in those conditions while the engine barely notices and still has a lot of passing power even while going up a 5.5% grade.
And before anyone asks what I was doing in Arizona in August... my dad has an in-hold in the middle of the national forest in the Dragoon mountains (1.5 hrs southeast of Tucson) and it is not nearly as hot as Phoenix or Tucson. July and August are the monsoon season there and just as the day is getting to it's hottest point the rains roll through and cool the place down. We had thunderstorms most days we were there. Very nice.
#209 of 250 Re: Trip computer vs Odometer vs GPS [yatesjo]
Aug 12, 2008 (7:03 am)
Very interesting, because I would consider the GPS distance to be the most accurate.
We have a c340, which is less accurate than yours, yet it can tell when I'm in local lanes on the highway. That means it can sense a distance of just a few yards.
Perhaps the odometer is conservative since some people will mount bigger tires?
The tires are new so it could not be tire wear.
#210 of 250 Re: Trip computer vs Odometer vs GPS [ateixeira]
Aug 12, 2008 (12:40 pm)
I'm seeing the mileage on the odometer showing less than the actual so my odometer will become closer to accurate as the tires wear down/become smaller in circumference. One thing I must keep in mind too is that my actual speed is actually a little bit higher than the speedometer reading- when my needle pointed to 75mph, the GPS put my speed at 76 or 77mph and the speed signs that flash the actual speed tended to agree with the GPS.
I agree that the GPS is probably the most reliable measure. The GPS closely agreed with the highway signage distances and is supposed to be accurate to within a few yards. It may miss lane changes or not recognize the differences between the inside and the outside of a curve, but overall those are quite small compared to the length of straight roads I traveled.