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Honda Civic Real World MPG

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

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

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#1768 of 2058 2008 civic si coupe w/summer tires by gp7676 Jul 27, 2008 (12:14 am)
i get about 24 mpg.
#1769 of 2058 Re: 2008 Civic Si 4dr gas milage [tiff_c] by sebring95 Jul 27, 2008 (6:40 am)
Replying to: tiff_c (Jul 26, 2008 2:52 pm) The Si is a great car and you can short shift it for better fuel economy. I can drive on our back roads in 6th at like 40mph!   This might actually be burning more fuel than by driving in a lower gear. Typically, throttle position will determine your fuel usage so if you have to give it more throttle in 6th to maintain speed, it may be better to rev a little higher in 5th but coast along. I've never measured a Civic, but on my Odyssey and Tundra (using a scanguage) the fuel burn is better using that method. I've bumped my mpg by 1mpg on my Tundra and nearly 2mpg on my Odyssey since adjusting what I thought was efficient driving. And these are guzzlers by all means....I imagine the results would be even better with close monitoring on something that gets 30-40mpg anyway. Replies to this message: tiff_c (Jul 27, 2008 7:05 am) ruking1 (Jul 27, 2008 7:20 am) sebring95 (Jul 27, 2008 8:15 am)
#1770 of 2058 Re: 2008 Civic Si 4dr gas milage [sebring95] by tiff_c Jul 27, 2008 (7:05 am)
Replying to: sebring95 (Jul 27, 2008 6:40 am) This might actually be burning more fuel than by driving in a lower gear. Typically, throttle position will determine your fuel usage so if you have to give it more throttle in 6th to maintain speed,   If you don't lug the car and 2,000 rpms is not lugging the car. We have all rural roads here so no stop and go and I get less if I keep it around 3k rpm's. scanguage does not wire into all the cars sensors does it? I don't think with the hills and type of roads we have that I could do much better, I just shift down when i come to a hill. If I was lugging the engine I'd agree with you but I consider 2,000 rpms to not be lugging the car. Most people don't get 30mpg combined in a Civic Si. Too much temptation to wind it out. Replies to this message: ruking1 (Jul 27, 2008 7:20 am) sebring95 (Jul 27, 2008 8:15 am)
#1771 of 2058 Re: 2008 Civic Si 4dr gas milage [tiff_c] by ruking1 Jul 27, 2008 (7:20 am)
Replying to: tiff_c (Jul 27, 2008 7:05 am) Yes I think if you can see a properly calibrated scan gauge in action on your SI, you will graphically see what is real and be able to make a hand eye brain pathway given most effective (situation, throttle, gear, etc.,) inputs.
#1772 of 2058 Re: 2008 Civic Si 4dr gas milage [tiff_c] by sebring95 Jul 27, 2008 (8:15 am)
Replying to: tiff_c (Jul 27, 2008 7:05 am) Scanguage will give you real time: gallons per hour (gph), mph, mpg, air temp, coolant temp, volts, and a bunch of other stuff except tranny temps...which I'd actually like to see. I have mine setup to constantly show mph, gph, rpm, and mpg. Plus you get various trip measurements....current, previous, day, previous day, tank.   I live in a very hilly area also and was surprised at the situations I found I was burning more fuel (comparing both mpg and gph) depending upon my driving. Right now I'm commuting 70 miles a day of two-lane state routes that are very hilly (get behind a semi and you're going 20mph up the hill until you can pass....). I was getting around 16mpg with my Tundra (V8 crew 4x4) driving my normal style (a tad aggressive). After adjusting shift points and the way I climbed hills, I'm up right around 17mpg and trip time is within a couple minutes +/- depending upon traffic more than my speed. So basically no change in speeds etc. just shift points and throttle position adjustments. Now if I really hypermile (is that an oxymoron on a truck?) I can get 20mpg particularly if I can keep the A/C off. Adds about 5 minutes to my trip. Still sounds crappy but 17mpg vs 20mpg is 20% improvement just by driving style.
#1773 of 2058 2008 civic MPG by bhasin Jul 27, 2008 (9:10 am)
I have been driving a 2008 Civic rental for about a month now. It had 3500 miles on it when i got it.   Average town mileage 25-27 MPG with lot of stop and go   Highway mileage - Lowest 34 MPG at average speed of 80 MPH                                  Highest 41 MPG at cruise control set at 75 MPH 2 hour run    80 MPH is 2800 RPM or so. Lower RPMs (< 2700) are the best for better mileage IMHO
#1774 of 2058 Below 3k by sandman46 Jul 27, 2008 (3:47 pm)
Have noticed improved mileage on my '06 LX when I keep the tach at or below 3k...slower acceleration from stop lights and such but a more smoother, controlled ride also. Even getting into the habit of letting off the accelerator when approaching stop lights and using engine braking to help slow the car down. Actively trying to "slow down" my driving style as the few extra minutes saved, if that much, just doesn't seem worth it anymore. At 53, figured what's my rush!   The Sandman Replies to this message: kltron (Jul 28, 2008 5:20 pm)
#1775 of 2058 Re: Below 3k [sandman46] by kltron Jul 28, 2008 (5:20 pm)
Replying to: sandman46 (Jul 27, 2008 3:47 pm) Hi Sandman - what you're doing is pretty much the basics of hypermiling: Watch the stops and starts, drive the speed limit, learn how to shift for economy. The ScanGaugeII helps by giving you instant feedback---and it gives you a kick in the butt when you see the tank MPG calculation going down as you drive! Yeah, I know what you mean---I find I don't need to be in a rush anymore.   My last 3 fills had a 41.72mpg average...I'm not expecting that on the next fill, which should be around 39-40mpg--I did a little less highway than usual and had extra weight in the car (passengers). I find that non-highway driving lowers the tank MPG pretty quickly per the ScanGaugeII. Ouch!   BTW...http://www.ecomodder.com gives you a list of hypermiling hints and a place to track your fill ups (see the "EM Garage"). You'll get a graph of the MPGs, and you'll get an image with your MPG that you can put on your web site if you like.   ...kl...
#1776 of 2058 42 on the hwy by cartagram Jul 29, 2008 (3:01 am)
I drove with AC on and two teenagers running a two-screen DVD player for 7 hours, between northern Alabama and the Gulf Coast. The segment that was all-highway driving got me 42 mpg. My Civic is an LX Automatic.   I kept the speed around 65 mph, and found a couple semi-trucks doing 65 to 70 consistently and so I stayed "behind" (3 or 4 seconds behind) them. Kept the cruise control off when hitting hilly sections.   There was a billboard advertising the Civic's 36 mpg. It's exciting to beat the new EPA as well as the old EPA ratings for my car.
#1777 of 2058 Normal 38-42 mpg with one person...... NOW by ruking1 Aug 07, 2008 (5:00 pm)
For two weeks, we have had two in the car (rather than one) for the daily commute, and the two switch driving chores (with the attending different driving styles) with 2 fills, each for 41 mpg.

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