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New 07Civic Hybrid ?s mpg/AC/etc

Created June 5, 2007, at 7:37 pm by JD702

I just puschased a 07 Civic Hybrid w/NAVI :D I'm very pleased with the car. It had 24 miles when I drove it off the dealership last Thursday I now have about 430miles. I went through my 1st tank of gas and averaged about 38.5 mpg. Is that normal? Can I expect to get more? I have learned to drive the car better by reading some stuff online but I wanted to know if anyone that has over 1,000 miles wouldnt mind sharing what their average is?
Also can anyone tell me why the ac stops blowing cold air sometimes..ie when i'm stopped and it over 100 degrees outside...anyone?:)
Overall I think the car is great! I'll probably be doing simple mods ie darker window tint and HIDs. any good recommendation to get another accessories like oem floor mats or a bike rack? other than Honda site ofcourse
thanks

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4 years ago

I believe when the weather is extreme, like 10 degrees or 100 degrees, the IMA does not function optimally. I think i read that in the car manual. I'm by no means an expert though. I have only had my car less than a week. The MPG is also decreased quite a bit when the A/C is on FYI. That's just how it goes. I'm not sure why.

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4 years ago

It`s my opinion as you drive your car you will need to learn how to properly maximize you mileage.
If you drive it like a non-hybrid car, your MPG will not be that much better than a non-hybrid.
It takes time and attention to gain better mileage as you learn new techniques.
It`s also necessary to break-in the engine to achieve better MPG.
Anywhere from 1K to 5K miles.
And as kchiltin27 stated. Weather extremes/environmental condition will have a direct effect on MPG. Also be advised tire pressure has a major effect on MPG. I started out at 32 PSI when it was New. I bumped it to 40 PSI after the first tank and now I run 42 PSI.
Mine started out at 43 MPG on the first tank. By the 5 tank I was able to achieve 61.1 MPG. All hand calculated.
I started driving it normal and my MPG dropped to 50 MPG
I now have an average of 52 to 55 MPG after learning how to maximize MPG and time trade-off`s.
Your A/C pump will shut down when stopped for longer periods. This is why you feel the warm air.
This is a normal operational characteristic. Using A/C will also cause lower MPG`s due to engine drag.

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4 years ago

Dr Diesel,

So you said you bumped your tire pressure all the way to 42 PSI? Is that in anyway dangerous? Especially if it's really hot out? I guess the worst thing you could is blow a tire but...

How often do you check your tire pressure? Once a week? Once every 3 days? Once a day?

Is tire pressure one of the biggest influences on MPG in your opinion?

By the way 61.1 MPG is very nice!

Thanks

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4 years ago

thanks that helps me alot! I do realize that the AC will limit my mpg in the summer but living in Vegas when its 120 outside i wont have much of a choice. I just have to deal with it for those 3 months.
But yes i am learning ways the keep at mpg between 50-100mpg when i'm driving. it will be nice when i can average 52-55 mpg:D

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4 years ago

kchilton27;12639 wrote:
Dr Diesel,

So you said you bumped your tire pressure all the way to 42 PSI? Is that in anyway dangerous? Especially if it's really hot out? I guess the worst thing you could is blow a tire but...

How often do you check your tire pressure? Once a week? Once every 3 days? Once a day?

Is tire pressure one of the biggest influences on MPG in your opinion?

By the way 61.1 MPG is very nice!

Thanks

kchilton27:

Dr.Diesel is quite right about the tire pressures. Safely raising them beyond the often recommended pressure of 32 PSI is something that yields good fuel economy results.

For instance, I have a direct TPMS system on my personal HCH-II and I currently I run my pressures at 48PSI in the front and 46PSI in the read tires. My TPMS monitoring console allows me to also observe and monitor the temperatures on each tire as well, I've setup alerts on threshold values for both pressure and temperature. The funny thing is that with the reduced friction of higher inflation, we also reduce tire heat as well so it it not all that scary and the fuel economy gains are very substancial

Of course, I personally do not recommend that people run at those pressures at all unless they are confortable with the idea. Generally, we suggest for those people seeking good fuel economy to start with 40psi in the front and 38 in the rear for good measure. Then increase the PSI's gradually up until they reach what they consider a good balance between comfort and fuel economy.

On a side note: Many hypermiliers will tell you that tire thread separation and failure is more likely if the tire runs underinflated for extended periods of time. Slight overinflation lever really caused a failure unless the tire had a manufacturing defect or a compromise it its structure due to a previous tire puncture and repair. Heck, I know some hypermilers that are running their Dunlops (44 PSI max sidewall rating) at more than 55 PSI (almost crazy if you ask me).

Cheers;

MSantos

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4 years ago

I checked my tire pressure today (I didnt wait the full 3 hours) and all my Dunlop tires are at 45, except one tire. It was at 33 (front, left) I was pretty shocked and glad I checked up on them. Brand new car! I am going to keep an eye on the tire to see if it's leaking over the next week. If it doesn't, I may call my dealership to inform them that huge mistake on that tire! I didn't even notice it. Hopefully I get better gas mileage now. Right now i'm getting 41-42 mpg. When I do a cold check of my tires should I go ahead and reduce their pressures to 38 and 40 like you mentioned earlier Dr Diesel?

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4 years ago

I said Dr Diesel at the end but i meant MSantos. woops

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4 years ago

kchilton27:

Most folks advise adjusting your pressures when the tires are cold. I would suggest that is a wise approach.

Cheers;

MSantos

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4 years ago

kchilton27;12639 wrote:
Dr Diesel,

So you said you bumped your tire pressure all the way to 42 PSI? Is that in anyway dangerous? Especially if it's really hot out? I guess the worst thing you could is blow a tire but...

How often do you check your tire pressure? Once a week? Once every 3 days? Once a day?

Is tire pressure one of the biggest influences on MPG in your opinion?

By the way 61.1 MPG is very nice!

Thanks

I have had no problems with these pressures and have heard of none to date.
I check mine every month. The tire is rated for 44PSI.
I run 40 PSI as a trade-off between tire wear and MPG.
The higher pressures will have a tendency to wear the center of the tire.
Whatever you set your tires at, keep an eye on wear and adjust accordingly.
Yes. Tire pressure is one of the major variable factors of MPG.

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4 years ago

MSantos;12645 wrote:
kchilton27:

Dr.Diesel is quite right about the tire pressures. Safely raising them beyond the often recommended pressure of 32 PSI is something that yields good fuel economy results.

For instance, I have a direct TPMS system on my personal HCH-II and I currently I run my pressures at 48PSI in the front and 46PSI in the read tires. My TPMS monitoring console allows me to also observe and monitor the temperatures on each tire as well, I've setup alerts on threshold values for both pressure and temperature. The funny thing is that with the reduced friction of higher inflation, we also reduce tire heat as well so it it not all that scary and the fuel economy gains are very substancial

Of course, I personally do not recommend that people run at those pressures at all unless they are confortable with the idea. Generally, we suggest for those people seeking good fuel economy to start with 40psi in the front and 38 in the rear for good measure. Then increase the PSI's gradually up until they reach what they consider a good balance between comfort and fuel economy.

On a side note: Many hypermiliers will tell you that tire thread separation and failure is more likely if the tire runs underinflated for extended periods of time. Slight overinflation lever really caused a failure unless the tire had a manufacturing defect or a compromise it its structure due to a previous tire puncture and repair. Heck, I know some hypermilers that are running their Dunlops (44 PSI max sidewall rating) at more than 55 PSI (almost crazy if you ask me).

Cheers;

MSantos

Hey MSantos.
Could you give some further info on your TPMS.
Is it a factory unit installed on Canadian units or aftermarket.. Thanks.

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4 years ago

DrDiesel1;12658 wrote:

Could you give some further info on your TPMS.
Is it a factory unit installed on Canadian units or aftermarket..

Sure Dr. Diesel;

I got my system from APC which is absolutely identical in every detail to an "eBay sourced" second system I had installed subsequently on my recently departed 2007 Prius. Here's the link to the eBay model:

http://cgi.ebay.ca/HONDA-MITSUBISHI-TIRE-WHEEL-PRESSURE-MONITORING-SYSTEM_W0QQitemZ230090268296QQihZ013QQcategoryZ33746QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

I believe I posted some pics of it at Greenhybrid some time ago.

Cheers;

MSantos

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4 years ago

Hey Msantos,

I went over to GreenHybrid.com and checked out the pictures section there to see your TPMS you installed. Pretty cool. Now i have some questions for you. haha

First one, how is your 4 port USB drawing power? From the 12V cigarette lighter? Where do you buy something like that? I wasn't aware USB ports could be in cars! Crazyness.

Second one, how hard was that solar panel installation to do?

Third one, how has that solar panel installation helped power your battery on your car compared to before it was there?

Lastly, how expensive are solar panels like that?

Thanks!
Keith

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4 years ago

MSantos;12663 wrote:
Sure Dr. Diesel;

I got my system from APC which is absolutely identical in every detail to an "eBay sourced" second system I had installed subsequently on my recently departed 2007 Prius. Here's the link to the eBay model:

http://cgi.ebay.ca/HONDA-MITSUBISHI-TIRE-WHEEL-PRESSURE-MONITORING-SYSTEM_W0QQitemZ230090268296QQihZ013QQcategoryZ33746QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

I believe I posted some pics of it at Greenhybrid some time ago.

Cheers;

MSantos


Thank you Sir.
Greatly appreciated...............:D

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4 years ago

kchilton27;12665 wrote:

First one, how is your 4 port USB drawing power? From the 12V cigarette lighter? Where do you buy something like that? I wasn't aware USB ports could be in cars! Crazyness.

The USB hub is a simple pocket model that can be bought in almost any computer store or on eBay. It was pretty inexpensive and is usefull when someone wants to charge their cell phone or PDA or iPod.

The Hub simply plugs into a "12V auto outlet to USB adapter". The latter can also be bought as a PDA/GPS/Phone accessory on eBay as well.

kchilton27;12665 wrote:

Second one, how hard was that solar panel installation to do?

Third one, how has that solar panel installation helped power your battery on your car compared to before it was there?

Lastly, how expensive are solar panels like that?

The install was pretty easy. Once you find a good ground point in the trunk then you only have to run a single wire to the fuse panel. Make sure you use an inline fuse on that wire and that you provide a safe "quick" disconnect somewhere under the dash. The most time consuming aspect of this is the running of the wire to the dash - It helps to make it a clean job.

My 12V battery is now always topped-off. The positive secondary side effect of this is that the IMA charging process is now less prevalent - It occurs less often and in much smaller durations - if you have a scangauge you can actually see the IMA charging process intervening BTW.
Before the installation, it was common for me to almost deplete my 12V battery (at one point I actually did). After the install however, the battery constantly displayed a full charge even in the coldest winter months which to many of us is well worth the cost of the diminuitive panel.

I bought a whole box of these panels (6 or so of them) for roughly $10-$15 a piece.

Cheers;

MSantos

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4 years ago

i'm scared of winter now and my battery not being charged....

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4 years ago

What is the benefit of having your PSI 2 less in the rear of the car?

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4 years ago

kchilton27;12673 wrote:
What is the benefit of having your PSI 2 less in the rear of the car?

Weight. Most of the weight is in front. The drive-train is heavier than the batteries and fuel tank.

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4 years ago

How do these cars perform in the wintertime?????

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4 years ago

kchilton27;12683 wrote:
How do these cars perform in the wintertime?????

I live in Kalifornia....I`m sure they will do well here....:D
The temperature extremes will have an effect on overall MPG, but the car itself should be just like any other FWD Automobile.:cool:

apensity

3 years ago

Re: tire pressures, check out this article provided by the CHP to it's officers: http://www.officer.com/article/article.jsp?siteSection=19&id=27281
I run my tires at 44 psi. The "overinflation" issues with the centers being worn first are based on older tires (typically bias ply). THese days with the new steel belts and kevlar belts and tire design, the tires hold their shape better no matter what inflation over recommended inflation pressure they are (as you can see they are running stock tires on the "trick car" at 100 psi while running on two wheels in the article above). Hydroplaning, performance, mpg, etc. all benefit from max inflation pressure. Tire companies "recommend" lower pressures to maximize "comfort" levels when driving, and also they wear out quicker, so, thus following, you buy more tires! *DING!* A vested interest on their part to counteract anything we find as hypermilers. I've been speaking to many hypermilers running their tires at extreme pressures and ALL have said their wear is even, mpg is better, and NO blow outs or failures.

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etp
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3 years ago

I have done this since 2003 with many vehicles with no problem at all. Pump up man.

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3 years ago

After reading this thread and doing some other reading I went out a few minutes ago and raised the tire pressure on my '08 HCH to 40 lbs. I did note on the sidewall of the tire to not raise pressures above 40 psi....

cheers,
Steve in So Cal

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etp
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3 years ago

Are you sure it didn't say 44PSI?

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3 years ago

Hi Steve;

I do not recommend you start by exceeding the maximum sidewall rating. If find it odd that it reads 40 instead of 44 or 51. In any case, if it is really 40 then you can start by setting the front tires to 40 and the rear to 38. Then if you are comfortable with it just go up from there as you see fit. ;)

Cheers;

MSantos

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