Go Back   Honda Civic Forum > Honda Civics by Generation > 6th Gen
Register Forgot Password?

6th Gen In the years from 1996 to 2000 Honda released it's 6th Generation Civic. Chassis codes: EK9, EK4, EK3, EJ6, EJ8, EJ9, EM1

Welcome to civicforums.com!
Welcome to civicforums.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join civicforums.com today!



Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
Old 05-11-2010   #1
Registered!!

 
Join Date: Feb 2010
Posts: 53
Points: 1,684, Level: 23
Points: 1,684, Level: 23 Points: 1,684, Level: 23 Points: 1,684, Level: 23
Level up: 84%, 16 Points needed
Level up: 84% Level up: 84% Level up: 84%
Activity: 0.8%
Activity: 0.8% Activity: 0.8% Activity: 0.8%
iTrader: (0)
Rep Power: 0
97 Civic coupe is an unknown quantity at this point
Please help! Why is my gas mileage so bad!?

I have a 97 ex coupe that gets only 18 mpg on a good day. I'm not a lead foot and maintain my car well. I've recently replaced the plugs, fuel filter, exhaust manifold (cracked), and had an oil change. My air filter is fine. Check engine light is not on. Anyone having this problem too? Or is it just the fact that it's 13 years old with 204,000 miles? Still runs great though so I have no idea.
Thanks in advance!
97 Civic coupe is offline   Reply With Quote
Old 05-11-2010   #2
Registered!!

 
Benny88's Avatar
 
Join Date: Mar 2010
Location: brisbane, Australia
Age: 26
Posts: 24
Points: 1,429, Level: 21
Points: 1,429, Level: 21 Points: 1,429, Level: 21 Points: 1,429, Level: 21
Level up: 29%, 71 Points needed
Level up: 29% Level up: 29% Level up: 29%
Activity: 0%
Activity: 0% Activity: 0% Activity: 0%
iTrader: (0)
Rep Power: 0
Benny88 is an unknown quantity at this point
Re: Please help! Why is my gas mileage so bad!?

when u say air filter, do u mean stock filter? if so i cant help then
but if short ram or cold air intake, ive heard that if u dont reset ur ecu then there is problems like urs where your not getting the mileage u would want..

but yeah if its stock, sorry dont know whats happening!
__________________
The Dream
Benny88 is offline   Reply With Quote
Old 05-12-2010   #3
Registered!!
 
Join Date: Jan 2010
Posts: 333
iTrader: (0)
Rep Power: 0
civicpapi is an unknown quantity at this point
Re: Please help! Why is my gas mileage so bad!?

Quote:
Originally Posted by 97 Civic coupe View Post
I have a 97 ex coupe that gets only 18 mpg on a good day. I'm not a lead foot and maintain my car well. I've recently replaced the plugs, fuel filter, exhaust manifold (cracked), and had an oil change. My air filter is fine. Check engine light is not on. Anyone having this problem too? Or is it just the fact that it's 13 years old with 204,000 miles? Still runs great though so I have no idea.
Thanks in advance!
How is it running? Ex's never did get great gas mileage (dx's much better). I average maybe 25 in mixed driving even when new.

18 sounds low, is that just city and stop and go?

make sure you are doing the gas mileage right, make sure you fill up the tank and reset the odometer, next time you go back to the gas station and write down the mileage and then look at the gas pump and see how much gas was pumped to fill it up.

Divide the odometer's number by the reading on the gas pump and that equals your gas mileage.

Example 255 miles driven divided by say 9.7 gallons of gas equals 26.28 miles per gallon.

Last edited by civicpapi; 05-12-2010 at 11:07 AM.
civicpapi is offline   Reply With Quote
Old 05-12-2010   #4
Registered!!

 
Join Date: Feb 2010
Posts: 53
Points: 1,684, Level: 23
Points: 1,684, Level: 23 Points: 1,684, Level: 23 Points: 1,684, Level: 23
Level up: 84%, 16 Points needed
Level up: 84% Level up: 84% Level up: 84%
Activity: 0.8%
Activity: 0.8% Activity: 0.8% Activity: 0.8%
iTrader: (0)
Rep Power: 0
97 Civic coupe is an unknown quantity at this point
Re: Please help! Why is my gas mileage so bad!?

I do have just stock air filter. Everything is stock. I'm calculating it exactly how you said. It wouldn't be a big deal except when I got the car a year ago it was getting 23-26 usually. Then it went to about 20... then 18... it's gotten as low as 16. Civic with 127hp should be getting much more than 16mpg! It is all city driving but my driving style hasn't changed since the mileage changed. Car runs like new... people who have driven my car are in shock at how well it drives. Engine in great condition (at least it appears so... but with 18mpg i could be wrong)

Last edited by 97 Civic coupe; 05-12-2010 at 04:37 PM.
97 Civic coupe is offline   Reply With Quote
Old 05-12-2010   #5
Registered!!

 
dnice78's Avatar
 
Join Date: Aug 2009
Age: 24
Posts: 196
Points: 4,620, Level: 43
Points: 4,620, Level: 43 Points: 4,620, Level: 43 Points: 4,620, Level: 43
Level up: 35%, 130 Points needed
Level up: 35% Level up: 35% Level up: 35%
Activity: 0%
Activity: 0% Activity: 0% Activity: 0%
Images: 3
iTrader: (0)
Rep Power: 0
dnice78 is an unknown quantity at this point
Re: Please help! Why is my gas mileage so bad!?

The worst I've gotten (averaged) in my EX is 26, usually above or below 30... depending on tha foot
__________________
2006 Civic SI- Current
2007 Dope Status Ruckus
2002 Honda S2000 Track Sleut
96 Civic EX-Found and bought again!
dnice78 is offline   Reply With Quote
Old 05-17-2010   #6
Registered!!
 
Join Date: Jan 2010
Posts: 333
iTrader: (0)
Rep Power: 0
civicpapi is an unknown quantity at this point
Re: Please help! Why is my gas mileage so bad!?

Quote:
Originally Posted by 97 Civic coupe View Post
I do have just stock air filter. Everything is stock. I'm calculating it exactly how you said. It wouldn't be a big deal except when I got the car a year ago it was getting 23-26 usually. Then it went to about 20... then 18... it's gotten as low as 16. Civic with 127hp should be getting much more than 16mpg! It is all city driving but my driving style hasn't changed since the mileage changed. Car runs like new... people who have driven my car are in shock at how well it drives. Engine in great condition (at least it appears so... but with 18mpg i could be wrong)
Have you done the oxyegen sensors, that might help. Age can be an issue as well, 16 is low.
civicpapi is offline   Reply With Quote
Old 06-28-2010   #7
Registered!!

 
Join Date: Nov 2009
Posts: 5
Points: 1,173, Level: 18
Points: 1,173, Level: 18 Points: 1,173, Level: 18 Points: 1,173, Level: 18
Level up: 73%, 27 Points needed
Level up: 73% Level up: 73% Level up: 73%
Activity: 0%
Activity: 0% Activity: 0% Activity: 0%
iTrader: (0)
Rep Power: 0
mcote is an unknown quantity at this point
Re: Please help! Why is my gas mileage so bad!?

Brake caliper sticking and causing drag. You'ld smell it or feel a slight shimmy as rotor gets hot.??
mcote is offline   Reply With Quote
Old 07-14-2010   #8
Registered!!

 
Join Date: Nov 2009
Posts: 474
Points: 6,046, Level: 50
Points: 6,046, Level: 50 Points: 6,046, Level: 50 Points: 6,046, Level: 50
Level up: 48%, 104 Points needed
Level up: 48% Level up: 48% Level up: 48%
Activity: 0%
Activity: 0% Activity: 0% Activity: 0%
iTrader: (0)
Rep Power: 65
Nosepicker is a jewel in the rough Nosepicker is a jewel in the rough Nosepicker is a jewel in the rough Nosepicker is a jewel in the rough
Re: Please help! Why is my gas mileage so bad!?

Make sure you're using the right viscosity. I went from 10w-30 to 5w-30 and my mileage went up.
Nosepicker is offline   Reply With Quote
Old 07-15-2010   #9
Registered!!

 
Join Date: Feb 2010
Posts: 53
Points: 1,684, Level: 23
Points: 1,684, Level: 23 Points: 1,684, Level: 23 Points: 1,684, Level: 23
Level up: 84%, 16 Points needed
Level up: 84% Level up: 84% Level up: 84%
Activity: 0.8%
Activity: 0.8% Activity: 0.8% Activity: 0.8%
iTrader: (0)
Rep Power: 0
97 Civic coupe is an unknown quantity at this point
Re: Please help! Why is my gas mileage so bad!?

I always get my oil changed at the Honda dealership. I'm assuming they would use the correct oil.
97 Civic coupe is offline   Reply With Quote
Old 07-15-2010   #10
Super Moderator



 
Join Date: Sep 2002
Location: NV
Age: 34
Posts: 51,281
Points: 146,804, Level: 100
Points: 146,804, Level: 100 Points: 146,804, Level: 100 Points: 146,804, Level: 100
Level up: 0%, 0 Points needed
Level up: 0% Level up: 0% Level up: 0%
Activity: 54.5%
Activity: 54.5% Activity: 54.5% Activity: 54.5%
Images: 178
iTrader: (95)
Rep Power: 672
gearbox has a reputation beyond repute gearbox has a reputation beyond repute gearbox has a reputation beyond repute gearbox has a reputation beyond repute gearbox has a reputation beyond repute gearbox has a reputation beyond repute gearbox has a reputation beyond repute gearbox has a reputation beyond repute gearbox has a reputation beyond repute gearbox has a reputation beyond repute gearbox has a reputation beyond repute
Re: Please help! Why is my gas mileage so bad!?

never assume ive seen great shops use the wrong oil, fill too much, or forget to change the filter. honda dealers are even worse. in some places they just drive your car around the block and park it and say youre done. here are some common things that would cause bad mileage that you can check.

-worn oxygen sensors (even tho they last upto 100k miles, they start to lose efficiency in as little as 20k miles and continue to get worse over time).

-unevenly worn tires or underinflated tires (honda recommends 30psi)

-alignment is out of spec (how straight the tires point)

-driving style (if you mash the gas or go above 3k rpms alot or drive in a hilly area, mileage will suffer)

-environment (gas mileage is much worse at sea level due to more oxygen, and gas mileage is much worse in cold weather for the same reason). more oxygen = more fuel dumped in by the ecu.

-loose gas cap or faulty evap system can cause much of your fuel to evaporate

-higher than normal idle can waste gas (should be around 700rpms)

-worn spark plugs wires and incorrect ignition timing

-sludge and deposits in the engine (try a treatment of auto-rx.com in the oil)

-clogged fuel injectors can cause a poor spray pattern (more of a squirt instead of vapor) which wastes alot of gas. try lubecontrol.com gas additive

-certain tires are more aggressive than others and can have higher rolling resistance, causing worse mileage. some hybrid vehicles get a 10mpg boost just by using low rolling resistance tires that come stock.

it sounds to me like maybe the engine is just getting old and needs some cleaning to work more efficiently. i bet with the auto-rx and then the lubecontrol products in oil and gas, your mileage will go up significantly. even on my relatively new and clean motor, i got an extra 4mpg on the highway using the additives. i have gotten 15 mpg in my 2002 civic before just based on driving style so i know its possible to go that low.
__________________
2002 Honda Civic EX Auto
gearbox is offline   Reply With Quote
Old 07-17-2010   #11
Registered!!

 
Join Date: Nov 2009
Posts: 474
Points: 6,046, Level: 50
Points: 6,046, Level: 50 Points: 6,046, Level: 50 Points: 6,046, Level: 50
Level up: 48%, 104 Points needed
Level up: 48% Level up: 48% Level up: 48%
Activity: 0%
Activity: 0% Activity: 0% Activity: 0%
iTrader: (0)
Rep Power: 65
Nosepicker is a jewel in the rough Nosepicker is a jewel in the rough Nosepicker is a jewel in the rough Nosepicker is a jewel in the rough
Re: Please help! Why is my gas mileage so bad!?

Man, this site would be nothing without Gearbox.

to Gearbox.
Nosepicker is offline   Reply With Quote
Old 07-17-2010   #12
Registered!!

 
Join Date: Feb 2010
Posts: 53
Points: 1,684, Level: 23
Points: 1,684, Level: 23 Points: 1,684, Level: 23 Points: 1,684, Level: 23
Level up: 84%, 16 Points needed
Level up: 84% Level up: 84% Level up: 84%
Activity: 0.8%
Activity: 0.8% Activity: 0.8% Activity: 0.8%
iTrader: (0)
Rep Power: 0
97 Civic coupe is an unknown quantity at this point
Re: Please help! Why is my gas mileage so bad!?

I actually did try auto-rx and so far my mileage went up to 23mpg. Lot better than before. It's only been about 500 miles so hopefully it'll go up even more. Think I'll replace the spark plug wires too. One is a funky color and feels different than the rest.
97 Civic coupe is offline   Reply With Quote
Old 07-19-2010   #13
Trance Addict


 
MelJ's Avatar
 
Join Date: Dec 2009
Location: Troy, NY
Age: 27
Posts: 1,775
Points: 6,002, Level: 50
Points: 6,002, Level: 50 Points: 6,002, Level: 50 Points: 6,002, Level: 50
Level up: 26%, 148 Points needed
Level up: 26% Level up: 26% Level up: 26%
Activity: 1.7%
Activity: 1.7% Activity: 1.7% Activity: 1.7%
iTrader: (0)
Rep Power: 78
MelJ is a glorious beacon of light MelJ is a glorious beacon of light MelJ is a glorious beacon of light MelJ is a glorious beacon of light MelJ is a glorious beacon of light
MelJ87
Send a message via AIM to MelJ
Re: Please help! Why is my gas mileage so bad!?

Word. I agree with gearbox. As for spark plugs:
http://www.aa1car.com/library/reading_spark_plugs.jpg
It's a great picture to tell you how the engine is doing.
MelJ is offline   Reply With Quote
Old 07-19-2010
CivicForums
Honda Civic




Paid Advertisement
 
 
 
Reply


Tags
1996 , 1997 , 96 , bad , civic , gas , get , great , honda , im , losing , lx , mantain , milage , mileage , running , stock , years

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

  
User Login
Our Partners


used new
Top 10 Threads
$500 to replace o2 sensor???
fluctuating idle problem
Shifting problem, won't go into gear
Location of Vtec Solenoid Valve and Oil pressure switch on 98 Civic
96-00 ex rear disc conversion?
Power Window issues on my 96 EX
Tire Size
1998 Honda Civic Automatic Transmission slippage
Valve Cover Gasket
97 Civic RPM Fluctuation when Driving


All times are GMT -5. The time now is 08:47 PM.

   
Advertising - Privacy Statement - Terms of Service - Jobs
Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
All Content Copyright 2007 CivicForums.com
Emails Backup