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Honda Civic Real World MPG

2058 messages,  Last post on Aug 26, 2009 at 6:19 PM

You are in the Honda Civic Forum. Your Hosts are pat & karens

What is this discussion about? Honda Civic, Fuel Efficiency (MPG)


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#1814 of 2058
Re: Don't waste money ! [targettuning] by kenlw
Sep 18, 2008 (9:58 am)
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Replying to: targettuning (Sep 16, 2008 6:47 am)

>"When the owners manual states "at least 87 octane " in actually means not to use less than 87 octane. While the wording is somewhat misleading it is lower octane that is to be avoided."
 
I've never seen gasoline lower than 87 octane, at least not labelled as gasoline.
#1815 of 2058
Re: [izmirian] by tiff_c
Sep 18, 2008 (12:12 pm)
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Replying to: izmirian (Sep 15, 2008 5:29 pm)

I just got an 08 EX-AT as well. And 50/50 City/Hwy driving I got around 31 mpg. Is it too low?
 
Well I get that in my 2008 Civic Si which is a 6 spd manual and 197HP. I think your mileage will go up as you get more miles on the car.
#1816 of 2058
Re: Don't waste money ! [kenlw] by pescatore
Sep 18, 2008 (3:22 pm)
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Replying to: kenlw (Sep 18, 2008 9:58 am)

I was in the mountains of Colorado and Wyoming a month ago, and "regular" gas there was 85 or 85.5 octane, I think due to altitude.
#1817 of 2058
Sudden Large Increase in MPG by thechair
Sep 20, 2008 (6:30 am)
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Suddenly, without any apparent reason, my MPG jumped dramatically from 26 mpg to 37 mpg. It's an 07 Civic EX, automatic, with 30,000 miles on it. I had been getting a low of 25 mpg to a high of 27-point-something for the life of the car, but then two tanks ago, it went up a little... to 29 mpg on one tank. Then, two days ago, I drove from So Cal to Fresno, about a 500 mile round trip. I got 37.5 mpg. I had the air conditioner going full blast, and my gas was the same... Costco 87 octane. Not only that, but I had to scale Angeles National Forest through I-5's Grapevine. This meant climbing with high RPM's for miles.
 
I can't understand it. Since the beginning of this model year, there seems to have been two camps of owners. Those who get Civic-like mpg, and those like me who did not and who were surprised by lower mpg. Now my car has dramatically joined the first group. Has anybody else had an experience like this? Is there any rational explanation for it?
#1818 of 2058
Re: Sudden Large Increase in MPG [thechair] by kltron
Sep 20, 2008 (6:50 am)
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Replying to: thechair (Sep 20, 2008 6:30 am)

I can see it varying some, but 10mpg...??? Last weekend I was shuttling friends and cargo among various points, and my MPG for the tank went a little below 40, a loss of about 2-3mpg. The humid weather we had probably didn't help, and it'll be interesting to see if things change as it gets cooler here in New England. (You can follow it on http://www.ecomodder.com, my car's name is "CuteNiceButNotTheSame").
 
HOWEVER...to jump *that much* (27 to 37) is really incredible if you haven't changed your driving type or habits. Note, however, that if you usually do all stop-and-go city or sit in traffic, and then your 500 mile trip was highway, one could expect a change like this. It would be interesting to see what your next few tanks are like while you do more of your "normal" driving--please keep us posted.
 
And from Honda: The Insight comes back as a 4-seater in the spring. I haven't heard mpg estimates on that yet, though (not that I have any complaints with 40+ mpg in the Civic this summer).
 
...kl...
#1819 of 2058
by sr1945
Sep 20, 2008 (12:09 pm)
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No one gets the same gas mileage and no one should get all worked up when others seem to get a better mileage from the same car. We all drive differently
 
I drive one mile one way in the morning without the engine warmed up, hit a couple of long red lights and get about 15 1/2 miles per gallen. ( 08 Accord by the way. Had a 07 Civic with 22 City/34 Highway mileage with below driving habits )
 
I drive with the car warmed up, and further, and sometimes with shorter red lights and longer stretches of city road and get 22 miles per gallen.
 
I had 32 lbs of air in the tire and got less miles per gallon then later tried it with 37 lbs of air and got better gas mileage.
 
Later still, when the car was broken in the gas mileage increased.
 
So, unless we know exactly how someone drives, where they drive, in what weather, amount of air in tires, air on or off, and so on, we can never go by someone elses mileage.
#1820 of 2058
40.5 mpg @ 73 mph by ts45
Sep 21, 2008 (3:01 am)
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Just and update, have not posted for awhile.
 
Our 2007 1.8 EX Coupe on a recent trip from Mobile, Al to Chicago, Il. delivered 40.5 MPG on the road. Seems like mileage has gotten better. With AC on, 2 people, luggage.
 
I do top off the tank, to the rim, car has not blown up as yet (some have warned about topping off). The reason I top off is really check the mileage as accurately as possible.
 
Around town, stop and go getting 25.5 to 28.5.
 
My goal was to purchase a 40 MPG car (on the road mileage) and the Civic has delivered.
 
 73 MPH I can live with, really a pretty comfortable speed.
#1821 of 2058
Re: 40.5 mpg @ 73 mph [ts45] by kipk
Sep 21, 2008 (3:34 am)
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Replying to: ts45 (Sep 21, 2008 3:01 am)

>"I do top off the tank, to the rim, car has not blown up as yet (some have warned about topping off). The reason I top off is really check the mileage as accurately as possible."
 
Just curious. Are you waiting for something to go wrong? Something that could be very costly, before you heed the warnings?
 
Your mileage check would be just as accurate if you fill the tank with the pump at the slowest setting. Wait for it to click off. Wait about 5 seconds for the bubbles to settle. Then gently fill to the next click.
 
Kip
#1822 of 2058
by kenlw
Sep 21, 2008 (5:21 am)
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If your area is on seasonal ethanol usage, you may have started using non-ethanol laced gasoline. That will suddenlty and dramatically increase mileage. But if that is the case, expect it to go back down in the spring.
#1823 of 2058
Getting BAD MPG! by sphere99
Sep 29, 2008 (6:11 pm)
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I have an 08 Automatic Civic and city driving (downtown chicago) getting 18-19pmg, shouldn't I be getting better then that? I have 13k miles. Please help!

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