Civic Si: Your Gas Mileage

[AXIS]

Last week I hit 412, i barely shifted above 2k and highway was 55mph.... that was miserable driving, may have had a little fun but i averaged 36mpg in my Si

[Tom1222]

Originally Posted by doug piston

got 28 on my first tank.

You must be pushing your car uphill and then letting it coast down

[Tom1222]

Originally Posted by AXIS

Last week I hit 412, i barely shifted above 2k and highway was 55mph.... that was miserable driving, may have had a little fun but i averaged 36mpg in my Si

No wonder you have the new and improved California model with only half the CC's. On the other hand it wont go much past 55

[Tom1222]

Originally Posted by Usui

I'm still around 23.5

You do realize your car has 6 gears!? Use them !

Seriously if that is the best you get than there is something not quite right. Either you are slipping the clutch too much or you are hitting VTEC every 5 seconds. The worst gas mileage I got was on my first tank with mostly city driving and it was around 24 mpg. Now with these crazy temperatures that we have been having (-5 below and -25 windchill) my gas mileage has gone down some but I am still averaging around 25mpg with mostly city and some stop and go highway miles. Usually in the summer that will go back up to around 28mpg average.

[Usui]

Originally Posted by Tom1222

You do realize your car has 6 gears!? Use them !

Seriously if that is the best you get than there is something not quite right. Either you are slipping the clutch too much or you are hitting VTEC every 5 seconds. The worst gas mileage I got was on my first tank with mostly city driving and it was around 24 mpg. Now with these crazy temperatures that we have been having (-5 below and -25 windchill) my gas mileage has gone down some but I am still averaging around 25mpg with mostly city and some stop and go highway miles. Usually in the summer that will go back up to around 28mpg average.

I think it might be because I have a short commute (12 miles) over hills and through a lot of stop lights. The last tank I had I put in a good 180 mile high jaunt, even though I was driving less than mpg friendly, and I got 26.9, which is a lot better.

But I usually try to keep my RPMs above 2700, more often in the 3k to 4k range. I wonder if that messes with my MPG. The reason I do so is I feel like I might be bogging the little engine down if I try and accelerate below 2700 if I'm not in first gear or second gear.

[cto424]

do short commutes really mess with your mpg?....i drive like 10miles to work one way....and like 5miles to school....and with my luck i usually get all the red lights...

[Janizary]

Yes, short commutes, even all highway, can affect your MPG. If this is your "trip to work, and trip home" your car (even with the coolant temps at normal) is still 'running cold' and this will affect your MPG to a certain extent.

My commute to work is about 8 miles; almost all highway. If that is the 'only' miles I put on my Si (which I don't drive daily, so I had to purposely 'test' this) my MPG suffers by about 2mpg, compared to other short commutes such as driving around the beltway, around town, etc., with a 'warmed' engine.

Of course, adding lots of stoplights, traffic, etc. will reduce you MPG to the very low end of the 'estimated' section. Crappy winter gas does not help either (about 1.5mpg difference vs. my summer MPG on 'similar' routes...)

That said, I've had a few tanks that were in the 22.x/23.x range. However, those were either (1) buzzing about on SR168/Overton/Pahrump runs (lots of high revs), (2) traffic filled nightmares, or (3) craptastic short morning/evening commutes combined with one of the above.

[CUPRA]

I thought I was getting really crappy gas mileage till I looked in here... and I am about average.

Means my wife is getting waaaaay above average in her Si.
I blame the HFP kit and HFP 18's on my car, weighing it down.

I get about 22-23mpg
My wife is up around 29-30mpg

I guess I wear heavier shoes than her!

[subee13]

Or she drives like a little old lady and you drive it the way it should be driven.

[Tomoyuki]

I usually get either 23 or 24 mpg, a lot of city driving and stock in Miami's traffic, plus AC is always on. I think this is really good, also considering I own an LS1 camaro which sucks the living **** out of the tank whenever I get on it.

[Tom1222]

Originally Posted by Tomoyuki

I usually get either 23 or 24 mpg, a lot of city driving and stock in Miami's traffic, plus AC is always on. I think this is really good, also considering I own an LS1 camaro which sucks the living **** out of the tank whenever I get on it.

Compared to the Camaro, which car is more fun to drive?
When the new Camaro comes out I will probably trade in my Si for the Chevy. Can't wait...

[Skylinegtr06]

26+ depending on my mood

[Tom1222]

Originally Posted by Skylinegtr06

26+ depending on my mood

Cool... A MOOD Car Must be a new 21st Century thing

[Skylinegtr06]

You know what I mean, some times i feel like and sometimes I

[FMZ]

I got 29.34 MPG on my SI. I vtec maybe 4-5 times and it was on 91 octane gas. I drove it at speed limit and I would say average speed was somewhere between 70-72MPH.

I am now driving it harder then usual and will post what I get, btw running at 93 octane right now.

750 miles btw

[Cicero]

27-28 pure city. Always. No joke. Highway varies from 29-34 mpg. Long distance cruising at 82 mph only 29-31 mpg. Today, cruising at 40-60 mph I got 34.8 on a 146 mile trip, 20 miles of it was city driving. First day using FP60. Maybe it helped?

[Tom1222]

Originally Posted by Cicero

27-28 pure city. Always. No joke. Highway varies from 29-34 mpg. Long distance cruising at 82 mph only 29-31 mpg. Today, cruising at 40-60 mph I got 34.8 on a 146 mile trip, 20 miles of it was city driving. First day using FP60. Maybe it helped?

Wow you must have a freak on your hands. That's excellent gas mileage.
The best city mileage I have ever gotten was 25mpg. Actually I always get around 25mpg average with mostly city driving. Never drive Highway for long periods or time. But I think I would get 28-30 Highway tops.

Question. What's a FP60?

[Janizary]

FP60 from LCD. Another highly touted, yet debatable product.

http://www.lubecontrol.com/fuel.htm

[Tom1222]

Originally Posted by Janizary

FP60 from LCD. Another highly touted, yet debatable product.

http://www.lubecontrol.com/fuel.htm

Okay, thanks It's another one of those snake oil miracle fluids that rob you of your green stuff in your wallet

[Travis]

I have 600 miles on my si sedan and i checked the mileage the other day. I kept revs below 4000, I drove normal accelerating with normal traffic. Did not floor it even 1 time. Obeyed the speed limits most of the time. The result: 33.15 mpg in city. The a/c was not on much. I was in light stop and go traffic for 10-15 minutes. I filled up, drove for 52 miles ( I can't keep my foot out long) and filled up again. I feel I could attain the same or close maybe around 30mpg if i keep driving like a wuss. Yea I'm gonna do that....right. But anyway, i just wanted to know how good it was capable of. I have noticed full throttle runs use alot of fuel. I did the same thing a few days before but I made 2 0-80 mph runs and I raced a z28 and I got 26mpg. Went the same distance and same city driving.