Rep Power: 199

I don't know if it's only me or if all civics are like this (but i'm pretty sure it's only me). Since i got my car back in January the gas meter has been going down REALLY quickly from full until halfway, and then it goes down slowly (or regular i guess, since civics are good on gas). I'm wondering if thats just me? I tested out the milage on one tank of gas and i got about 350km (about 217 miles). I'm pretty sure this can't be right, something's probably wrong ... I would suggest a leak but i'm pretty sure there isn't one because you don't smell gas when you're sitting in the car and my car isn't leaking any liquid onto the ground.

 
Rep Power: 235

I'm on my 4th civic and they've all hovered around the halfway mark like that, from the '88 to the '01 I have now. Come to think of it, most of the cars I've had have done the same thing, more or less.

Any other symptoms other than bad mileage?

 
Rep Power: 199

Other than bad gas mileage i don't think anything is wrong... I wasn't terribly worried about it until a couple weeks ago i was in my friends '04 civic and we had been driving around a lot (he had a full tank when we started) and his meter went down maybe a not or 2 but thats it ... mine can go down way faster than that :P

 
Rep Power: 235

Kinda stumped if there's no other symptoms. Go down to Autozone and have them scan it for DTCs and see if any come back. The comp can store codes and not light the MIL.

 
Rep Power: 214

Alot of cars that I have seen when they are full they go down quick to halfway then go very slowly down. But how much gas mileage are you getting.

 
Rep Power: 199

I checked a while ago and couldn't remember, but when my tank empties i'll do a test :P How much SHOULD i be getting approx.?

 
Rep Power: 214

Anywhere from like 28 to 35 mpg i would say.

 
Rep Power: 199

How do i calculate that

 
Rep Power: 214

Just fill your tank all the way up till the pump will stop it and write down how many gallons it was. Then just drive normally without ******* the hell out of it and wait till the e light comes on to be almost empty. There are usually 2 gallons left when e light comes on. But when the light comes on then check how many miles that you drove from when you first got gas and take the miles and divide it by the gallons.

 
Rep Power: 199

Will do as soon as my gas is empty :P

... God damn civic has been stuck at half for 2 days now so this might take a while lol

 
Rep Power: 0

you say its been stuck on half for two days either you do little driving or you may have one of the faulty gauges where they will either get stuck sometimes then all the sudden drop to empty then slowly go back up to the actual spot of whats in your tank. This was actually quietly recalled by honda and im not sure they will do repairs for free anymore as ive herd there was a deadline for it i have the honda memo to the service techs just not on this computer i can dig it up if you want it. as far as i can tell they just replace the gas guage in the dash.

 
Rep Power: 199

Well we haven't done a ridiculous amount of driving in the past two days but it's gotten enough. I had no idea about a recall, the memo would be great, thanks!

 
Rep Power: 0

I'd say the easiest way to check your mileage would be to fill up and reset your trip odometer. Then drive as usual until you get low again, fill up again. Now divide the number of miles driven by the amount of gas you just put in. This number will be your mileage.

Example: 300 miles driven / 10 gallons fuel put in = 30 miles per gallon.


But about the gas gauge, in all my cars I've noticed at a full tank the needle sticks slightly to full before dropping at a decent rate to halfway where it slowly drops down again. For comparison I get about 30mpg and a half tank is anywhere from 150 - 180 miles into that tank of gas.

 
Rep Power: 199

Thats pretty much what happens to me! But you'd need to define decent because mine is at half in like 2-3 days TOPS without a lot of driving.

Good thing to know! Thanks

 
Rep Power: 0

I think it is around 40 - 50 miles before I see the needle coming down from the top.

This may help you out a little bit, all gas gauges are kind of weird in their own ways.
How gas gauges work

 
Rep Power: 214

Another way to to calculate your mpg and keep track of it is go onto fuelly.com and make an account. I have an account on there and I calculate my mpg every week.

 
Rep Power: 199

After spending a lil while on that site i think i might soon be creating an account. I was looking at the civics, as if there were 2 civics listed at getting 61 mpg... thats insane lol

Anyways i just filled my tank and reset the Trip A and B odometer. I drove about 50km and not a drop from F. I'll post results when it's empty again

 
Rep Power: 214

Ya there is alot of people on there that get really damn good gas mileage but its the hybrids of course. I am on there under 2002 honda civic si and I average out at right now with 29.8 mpg.

 
Rep Power: 199

Just added a car I'm pretty excited to start using this website!

 
Rep Power: 0

Its not only you dude, my 03 civic is like that too. It'll say I have an eighth left and the next time I turn the car on, it'll be at the halfway mark..lol