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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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#1998 of 2058
Re: Shell oil Brochure I read.... [kipk] by bearcrkrd
Jun 11, 2009 (2:51 pm)
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Replying to: kipk (Jun 11, 2009 3:54 am)

"In engines designed and timed for "Regular" fuel, Premium can be beneficial when the combustion chambers tend to get hotter than normal due to heavy loads, in the mountains, on hot days at high speeds, or when towing heavy loads."
 
Heavy load doesn't apply to me, but the rest does, and that's when I've got the top mileage on all the vehicles I mentioned. I don't do Premium on all road trips, that's how I noticed the gain, and they do fall most often during warmer Months and include long runs, and hills/mountains.
The little '01 Tacoma showed the least gain in mileage when using Premium. Bet it's still on the road, as I babied it, except for lots of miles driven per year. Problem was if I brought a jacket and thermos the cab was full..
#1999 of 2058
Re: Shell oil Brochure I read.... [familydadx4] by kipk
Jun 11, 2009 (5:41 pm)
Reply

Replying to: familydadx4 (Jun 11, 2009 10:20 am)

>"You mention better mileage with Shell. Are you talking about 5 mpg, or .5 mpg? Just looking for some type of numerical justification. "
 
familydad,
 
1-2 mpg increase seems about right with the Shell gas. I'm driving an '03 4WD Pilot.
 
With the "Flash Foods" gas I was getting 17-19 mpg local driving. With Shell it is more like 19-21. That is a 5%-10% increase. Right now the Shell is about $2.59 and the Flash Foods gas is $2,54. Cost per mile is a bit better with the Shell, and I feel it to be a "better" fuel for the engine and injectors.
 
REAL WORLD : MORE MONEY CAN BE SAVED WITH THE THROTTLE THAN WITH THE GAS PUMP PRICE.
 
I didn't see any appreciable difference with the other "Name brands". But,You may find that another brand runs better and gets better mileage in your car. It is a long slow learning process. And I don't have a clue as to why one brand of gas would get better mileage than another. But they sometimes do!
 
Kip
#2000 of 2058
new Civic by davepod
Jun 15, 2009 (11:51 am)
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Just purchased 09 civic lx coupe auto. mixed 50/50 driving on first tank calculated with gallons/miles to be 31 mpg. Happy so far.
 
#2001 of 2058
Re: new Civic [davepod] by mjsten
Jun 15, 2009 (12:12 pm)
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Replying to: davepod (Jun 15, 2009 11:51 am)

Wish you well.
 I have an 08 Civic EX auto with 24,000+ miles that I purchased specifically for the mileage and, quite frankly, it has not performed as I thought it would. I average 29.8 mpg over that 24,000 miles, around what I averaged on an 04 accord EX 4 cyl.
I drive a 80 / 20 hiway/ city mixed route daily. Watch the start stops, travel the speed limit, keep tires inflated, etc, in fact all of the stuff that you are supposed to do.
 May look at a hybrid or diesel next.
#2002 of 2058
Re: new Civic [mjsten] by thegraduate
Jun 15, 2009 (8:19 pm)
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Replying to: mjsten (Jun 15, 2009 12:12 pm)

I'd skip the hybrid assuming your 80hwy/20city won't change anytime soon. Hybrids shine in the city, diesels do GREAT on the highway.
#2003 of 2058
AC's effect on acceleration and mileage by dantz
Jun 23, 2009 (12:33 pm)
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Has anyone determined the Civic air conditioner's effect on both performance and mileage? Because I can't feel any difference in acceleration whether my 2008 Civic's AC is on or off. I realize that this model of Civic has a somewhat underpowered air conditioner, but it must also be remarkably efficient, as it seems to get the job done without any noticeable drag on the engine.
 
With my old Corolla I had the habit of temporarily turning the AC off whenever I needed an extra boost of power, for example on uphill freeway on-ramps, but with the Civic I can no longer tell the difference, so I just leave the AC on.
 
All I can think of is to do some test accelerations from zero to 60 with the AC both on and off to see if there is much difference in the elapsed time or the distance required. (I'll try doing this and then report back.)
 
I'd also be interested in knowing if anybody with a ScanGauge (or a similar device) has checked the instantaneous mileage in order to determine the AC's effect on highway mileage, while leaving the windows up. All I have found so far is comparisons between AC with windows up, and no AC with windows down, but that comparison is flawed because they are changing two elements at once. I think leaving the windows up and keeping the fan on while switching the AC on and off would be a fairer test.
#2004 of 2058
Re: AC's effect on acceleration and mileage [dantz] by thegraduate
Jun 23, 2009 (8:38 pm)
Reply

Replying to: dantz (Jun 23, 2009 12:33 pm)

In almost any car these days (even my old '96 Honda), when the throttle is pushed hard, the A/C will momentarily cut-off on its own in order to channel more power to the wheels instead of the A/C. My dad's 2007 Civic is no different. On a hot day, get on the throttle hard while you feel the A/C blowing on your face. You'll feel a difference I'd bet.
 
Hope that helps.
#2005 of 2058
Re: AC's effect on acceleration and mileage [thegraduate] by dantz
Jun 23, 2009 (10:56 pm)
Reply

Replying to: thegraduate (Jun 23, 2009 8:38 pm)

Yes, I've considered that possibility, but as far as I can tell the AC appears to stay on and keep working during hard acceleration. But I'll test it again.
#2006 of 2058
My first fill up - 2009 Civic LX-S by bryan200k
Jun 24, 2009 (12:34 am)
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Bought my 2009 Civic LX-S just over a week ago. My first fill up was at 347 miles driven. 300 was Highway, 47 miles was City. Calculated MPG was 34.64 for first tank.
#2007 of 2058
Re: AC's effect on acceleration and mileage [dantz] by ras314
Jun 24, 2009 (2:20 am)
Reply

Replying to: dantz (Jun 23, 2009 12:33 pm)

I have a scan gauge and tried many times to determine the effect of the AC on mileage. Instantaneous mileage jumps around to much to make any comparison with AC on or off. Tried many times to run 10 miles over flat roads with no wind, still couldn't get conditions steady enough to see a noticeable difference with AC, Finally gave up and use the AC whenever I want. Maybe someone else has had better luck.
 
My mileage has slowly increased as I put more miles on, now around 18000 and haven't see a tank fill in some time less than 45 mpg. 2007 civic with manual, probably around 95% or more highway and lots of 55 mph roads. At interstate speeds mileage will drop to 40 mpg and even less with headwinds.

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