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Highlander Hybrid The first hybrid SUV from Toyota, the Highlander Hybrid!

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post #151 of 408 Old 08-05-2009, 05:29 AM
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Hi have an 08 HH (6K Miles) and in town, this time of year, I average 26-27 MPG and that's with some mixed driving thrown in (Highway 70 MPH). The lowest I ever got with either my 06 or this HH was 19 MPG and that was in the dead of winter and sub zero temps. So I would say you are not getting what you should either as a result of your driving style or a programming issue with the vehicle.

Do you have a lot of hills? Hills really kill the mileage. Also, try not driving in the ECON mode and feather the gas pedal a little more, I found it allows you to be out of the gas more and get to EV mode quicker and my mileage went up when I did this, but this could be as a result of where I drive. As for the tire pressure, I run mine at 36 currently and am thinking of bumping it to 38 as some have reported better tire wear on the Toyo tires there.

I would certainly go back to the dealer and have them check it out as that is not close to what you should be getting.

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Last edited by Bob259; 08-05-2009 at 05:32 AM.
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post #152 of 408 Old 08-05-2009, 06:53 AM
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I have an 06 HiHy and we get around 26mpg in mixed, mostly freeway driving. so your 17mpg in stop and go is concerning. mpg will vary widely based on driving style, and driving conditions. ECON mode moderates throttle response to try and keep the ICE off as much as possible, whereas EV mode is strictly electric. mind you, only the newer hybirds come with these modes as my 06 does not, but these things i have learned by driving the newer hybrids and speaking with the largely not very informative folks at Toyota.

as i've said, driving style is one of the most important determinants of resultant mpg, and therefore your goal while driving the vehicle should be to drive it gently. i learned to adjust my driving style by observing the power flow display, basically the less time the ICE is on, the better your mpg. this, combined with coasting to stoplights to maximize the regenerative braking as well as feathering/pulsing the throttle will maximize the potential of the hybrid. and for the best advice on how to maximize fuel economy, just do a yahoo search on "prius driving tips" and do some reading, as the prius folks have been doing this for longer than we have and they know how to hypermile...

a word on tire pressure, you can inflate your tires beyond the manufacturers specs as these specs are geared more toward comfort and ride compliance and less toward fuel economy. just make sure that you never exceed the MAX PRESS printed on the tire sidewall. also realize that air expands as it gets hot and tire pressure will elevate further with distance driving, usually about 3-4 psi for long distance nonstop trips. with all this said, the max press printed on my tires are 44psi, and i run my tires between 38-40psi cold.

lastly, there is a chance there is something mechanically wrong with the vehicle, but i do not think this is likely. so try some of these tips and if your mpg still sucks, have the stealer look at it.

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post #153 of 408 Old 08-05-2009, 11:45 AM
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Quote:
Originally Posted by Bob259 View Post
Do you have a lot of hills? Hills really kill the mileage. Also, try not driving in the ECON mode and feather the gas pedal a little more, I found it allows you to be out of the gas more and get to EV mode quicker and my mileage went up when I did this, but this could be as a result of where I drive. As for the tire pressure, I run mine at 36 currently and am thinking of bumping it to 38 as some have reported better tire wear on the Toyo tires there.
I totally agree with that. People who tend to rely on the ECON mode or, even regular HL owners who engage the "Snow button" in an effort to improve mileage consistently report poorer mileage. Being lighter, smarter on the gas while driving will give you the biggest mileage improvement. Just an opinion.



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post #154 of 408 Old 08-05-2009, 11:52 AM
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I've compared the ECON and the 'snail mode' driving back to back, and have consistently done better with ECON mode. Not only does it dull throttle response, but it also changes the metrics for the way the climate control works and changes the response of the hybrid system and transmission. It is there for a reason.

I do agree on the 'snow mode' issue for non-hybrids though--a waste of time and potentially hazardous to your tranny for long term use.

I get ~29 at present with my 09 hybrid. I'd take yours into the dealer.
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post #155 of 408 Old 08-28-2009, 06:02 PM
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post #156 of 408 Old 08-29-2009, 06:21 AM
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the only way to correlate the display to the physical tires is to do the following:

using 2 people, one to observe and report tpms data and the other to physically adjust each tires pressure:

display the tpms data on the mfd, noting each lines tire pressure.

starting with the left front tire and moving clockwise,

1) denote maximum tire pressure for specific tire as displayed on tire wall.
2) add or remove tire pressure while observing tpms data. you are looking for the tpms line that indicates a change in tire pressure. if you increase pressure, look for a positive change. if you decrease pressure, look for a negative change. it might take a minute or two for the tire sensor to report a change in pressure. be sure not to exceed maximum tire pressure. if more than one line reports a change in pressure, wait a few minutes and repeat step 2 until only 1 line changes.
3) record line number of tpms display and tire position(lf,rf,rr,spare,lr). the tpms line that indicates the change in tire pressure is now correlated with that physical tire.

continue steps 1-3 above until all 5 tires uniquely correlate to an individual line in the tpms display.

save correlation data

reset all tires to your desired pressure one at a time using above steps to verify correlation data.

remember: this correlation will change any time a tire is physically moved to another tire location. i.e., tire rotation.

Last edited by nyceshirtz; 08-29-2009 at 06:28 AM.
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post #157 of 408 Old 08-29-2009, 07:49 PM
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Quote:
Originally Posted by nyceshirtz View Post
remember: this correlation will change any time a tire is physically moved to another tire location. i.e., tire rotation.
Are you sure about this? The rest is good...I thought the sensor was with each wheel.
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post #158 of 408 Old 08-29-2009, 08:07 PM
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when the toyota service technician did the above procedure on my 09 hihy, he told me to have the procedure repeated after the tires are rotated. I assume the sensors are in the tire or attached to the tire stem. i did not see anything on the rim.
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post #159 of 408 Old 08-29-2009, 08:31 PM
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Quote:
Originally Posted by nyceshirtz View Post
when the toyota service technician did the above procedure on my 09 hihy, he told me to have the procedure repeated after the tires are rotated. I assume the sensors are in the tire or attached to the tire stem. i did not see anything on the rim.
TPMS is usually associated with the stem, but when tires are rotated they are not remounted...the entire tire and rim are moved (doh), thus the original correlation will work. you just need to know where they were moved..LOL
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post #160 of 408 Old 08-29-2009, 08:45 PM
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they are still correlated, but the labeling or name of the tires location will change. i.e., if line #1 is rf and that tire is moved to rr, then line #1 becomes rr(duh)! lol
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post #161 of 408 Old 09-26-2009, 10:36 AM
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Unhappy What to do to prepare for approaching WINTER?

What should I do?

I have Highlander Hybrid sitting on 19" Toyo Open Country tires:

-Buy snow chains? Never used them...when and how do you put them on and for how long?
-Buy 4 dedicated snow tires...BTW do I get new rims too (19" or 17"), if so why?
-Buy tow cables?
-Is there a "quick unstuck" kit? Besides keeping a small shovel...

WILL TOYOTA OR AFTERMARKET DEVELOP TRACTION DISABLE?

2008 HiHy 270hp V6 4WD-i (PicLink)

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post #162 of 408 Old 09-26-2009, 11:29 AM
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Quote:
Originally Posted by jmuhammad View Post
What should I do?

I have Highlander Hybrid sitting on 19" Toyo Open Country tires:

-Buy snow chains? Never used them...when and how do you put them on and for how long?
-Buy 4 dedicated snow tires...BTW do I get new rims too (19" or 17"), if so why?
-Buy tow cables?
-Is there a "quick unstuck" kit? Besides keeping a small shovel...

WILL TOYOTA OR AFTERMARKET DEVELOP TRACTION DISABLE?
No to chains, clearance issues
Yes to 4 snows, I just ordered 4 Blizzak 19"" from the Tire Rack

Small shovel and some sand is always good

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post #163 of 408 Old 09-26-2009, 01:58 PM
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Originally Posted by Bob259 View Post
No to chains, clearance issues
Yes to 4 snows, I just ordered 4 Blizzak 19"" from the Tire Rack

Small shovel and some sand is always good
Thanks! I also found a nice page on winter driving here.
http://www.mhd.state.ma.us/default.a...&sid=aboutText

I going to start getting ready now...we had an early winter last year. I had my Honda Accord then and got stuck a couple of times really badly.

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post #164 of 408 Old 09-26-2009, 04:13 PM
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Chains would be preferable if there were no fit issues, but definitely snow tires. Like Bob suggested I'd take a shovel and tow straps too. I always have two straps (with hooks) aboard whether I'm in snow, ice, sand, etc.



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post #165 of 408 Old 10-04-2009, 11:42 AM
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tire size on hh

currently I have 225/65 R17 on my o6 hh.
can I change that to 225/60 R17 without any problems?
and yes im not up on tire size things, what do the 65 refer to?
thanks
chris
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