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New here. Question on gas mileage.

Old 22-Aug-2008, 01:27 PM
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New here. Question on gas mileage.

Hey Everyone,
I just bought a civic last month and have been lurking on this site reading and learning a lot about my car. It's a black 05 civic si (4dr auto).
So far the car is great with smooth and quick pickup. I like the way it handles as well.
I have been keeping an eye on the fuel consumption the last few fillups. I noticed that I'm getting from 570km to 600km per tank (40L) with 50% highway. I don't drive hard at all. Just wondering if this is normal and if I can do anything to get more mileage out of it.
What's everyone else getting?
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Old 22-Aug-2008, 01:44 PM
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Originally Posted by Rcrew View Post
Hey Everyone,
I just bought a civic last month and have been lurking on this site reading and learning a lot about my car. It's a black 05 civic si (4dr auto).
So far the car is great with smooth and quick pickup. I like the way it handles as well.
I have been keeping an eye on the fuel consumption the last few fillups. I noticed that I'm getting from 570km to 600km per tank (40L) with 50% highway. I don't drive hard at all. Just wondering if this is normal and if I can do anything to get more mileage out of it.
What's everyone else getting?
You numbers are reasonable, there isn't much else to be done. Make sure to clear your car/trunk of clutter that doesn't belong in there. Added weight = more fuel used. Is your car stock? The only other major things I can think of are turbo/exhaust/rims+tires.
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Old 22-Aug-2008, 01:58 PM
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I get around the same on my 5 speed. I also have a small box and golf clubs that call the trunk home.

Lighten up on the pedal a bit, other than that there isnt much you can really do.
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Old 22-Aug-2008, 04:04 PM
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i get 450-500km on my 98 lx auto 15 inch rims, no engine mods what so ever.
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Old 24-Aug-2008, 01:31 PM
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My wife has the same exact car as yours, but an '04 model. She gets exactly the same gas mileage and honestly there isn't much you can do to improve on that. I found the gas mileage on the '04 - '05 4 door Si sedan not to be as good as the same year LX/DX coupe 5 speed. My brother has the 5 speed coupe and he gets 650 - 700 kms per tank.
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Old 24-Aug-2008, 01:54 PM
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Originally Posted by hula_balu View Post
i get 450-500km on my 98 lx auto 15 inch rims, no engine mods what so ever.
I get the same as you in my delsol..
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Old 24-Aug-2008, 02:13 PM
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wow, I'm lucky if I get 500 kms to a tank.
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Old 24-Aug-2008, 04:02 PM
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From what you've said, those numbers sound about the average...reasonable driving speeds & weight reduction (as were previously mentioned) might help minimally, but overall, what you listed seems about right.
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Old 24-Aug-2008, 07:19 PM
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damn.. I'll be happy to get 570km-600km a tank on my GSR.
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Old 24-Aug-2008, 09:44 PM
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Originally Posted by 98civ View Post
wow, I'm lucky if I get 500 kms to a tank.
try using fuel injector cleaners from CT... I use it once and awhile (3x/year), I think it works but only for high millage cars. warming up the car for a minute or two also works.. I find that the car runs much better when I wait a few mins before driving off.
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Old 24-Aug-2008, 09:51 PM
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if i beat my car i get about 250kms on a half a tank, so 500 clicks id say on a tank beating it...if i drive relaxed how i usually do i get about 700 or so to the tank.
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Old 24-Aug-2008, 10:41 PM
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I get 550+ with my out of tune GS-R...its the only thing keeping me ftom replacing my cat and o2 sensor which are causing the engine light to be on...heck I even have a bad wheel bearing too...thats next month's job, this month's was all around brakes
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Old 25-Aug-2008, 09:26 AM
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Thanks for the replies guys. Yeah my car is stock right now with 15" stock rims.
I'll do a tuneup next month or so and will check if it makes any difference in the gas mileage.
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Old 12-Sep-2008, 02:52 PM
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I get 740-760 kms on a 99 civic coupe (1.6L) 5 speed 95% highway, speed not exceeding 120km/h, mostly 110 km/h.
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Old 15-Sep-2008, 01:32 PM
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im at 415 km and so far half tank 65% hwy 35% street driving at 120-130 shifting at 3000
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Old 15-Sep-2008, 01:45 PM
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i get around 450-480 on a tank but i beat it day to day haha. also with bored out head and chipped ECU i'd say im doing fine, altought my buddy with sohc ZC gets close to 600km
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