I live in the city and have been averaging 11 mpg in my 2006 honda civic Up until about three months ago, I was getting in the mid-twenties. I realize that the stop and go traffic and the averaging 25 mph would lower the fuel efficiency, but should it be that much? I just got my oil changed at the beginning of the summer, haven't put close to 3000 miles on it yet. Is there something I can do to change this? Or am I just going to have to accept it? I guess the upside is that I don't drive too much, so I'm not filling my tank every week, but 11 mpg is awful for a civic!

 

Try a K&N air filter, an appropiate oil change, ngk iridium láser spark plugs, that worked for me

 

U notice any change in performance or the way the car drives?

 

Considering the age of the car you may want to evaluate other circumstances than the oil. Has anything else changed in the past few months?

 

Yea 11mpg city is way too low seems like something is wrong. Like others asked have you made any other changes and do you notice loss in performance to start. Have you had any check engine lights or anything?

 

that worked for me, my car is preowned civic 09 4dr, I live in the city too and had been averaging 16 miles, after changing those things new average is 21 miles.

 

I forgot to mention the transmission oil

 

You could change or rotate your tires, and see if that helps at all. I would also go get my transmission checked out as well.

 

Its highly unlikely tires are the reason he lost half of his average MPG.

 

I don't think.the tires would affect the MPG that much dry changing all the fluids, maybe Evan the plugs and wires.

 

iam with garrett05 tires will not make ur mpg that low , it could be anything , brakes are sticking( lift all wheels of the ground and rotate them by hand , look for any binding on the rotation ) , one if not all cylinder have lost compression ( do a leakdown test , compression test ) check ur spark plugs gap them correctly , check timing if anything that will make ur mpg that low is a weak engine not timed right or weak cylinder

 

Yeah, tires would not reduce your MPG down to 11. Does the car idle weird?

 

Take a look at your exhaust pipe (and smell the exhaust after the car is warmed up). If it looks rather sooty or smells "rich" (unburned gasoline smell) you might have an oxygen sensor related problem or even a temperature sensor. I think these things should trigger a check engine light, but there could be something going on there.

Like the others said, start with a good tuneup and look for any vacuum lines that might be loose or in bad shape while you are at it.

 

Try to change your driving habits... learn to drive and save fuel.

 

I've got the same problem with my 07 Civic coupe, I don't drive it hard and always shift at 3,000 RPM or lower. I'm gonna get new spark plugs and replace the air-filter as well as do an oil change. Hopefully it will fix the problem because right now I get the same mileage as on my old 2000 VR6 Jetta which really sucks

 

Clean MAF sensor, reset ECU...
According weather condition (colder) and longer time to car engine reach working temperature your engine can use more full .

 

and maybe she got case, it's depends on how good and smart lawyers from Honda but like I say, it's everything about driving habits , take look at video-->