it seems I am only gettin 20 mpg in my car nowadays .. whats going on here?

just filled up my tank last week, reset the miles calculator and got 212 miles on it (21.2 mpg)

does anyone know any possibilities why it could be so low? since i should be gettin "30/34 mpg"

being jobless, barely affording gas - this is killing me, help please! (i dont floor it either, no racing)

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Car
1990 civic hb, no mods, 200k miles

 

you millage is kinda up there.

 

how many gallons do you put in at the pump? Thats about what i get(210 on 8 gallons) about 26mpg... i'm gonna replace my O2 sensor tomorrow and i hope that will boost it up a bit.

 

it could be your o2....my b16 gets 30mpg (city+hwy driving) w/ a s1 tranny (5k rpm @ 80mph)

 

30mpg on a s1 tranny? that's very good! i'm getting like 20city 28hwy on my s1 tranny. annoying when on freeway.

 

bad o2, or could be that your compression is bad enough to the point where your motor's output has become less efficient.

 

I put 10 gallons at the pump .. i mean really though, for having nothing done to the car i should be expecting at / around 30 mpg... u guys are talking an engine that has way more power than the stock 90 hp DX engine and getting better gas milage

on a difficulty 1 to 10, how hard is the o2 sensor to do? and how much does this cost?

 

I avg about 37 mpg.......Usuallly put somewhere around 290 on the tripometer and about 7.5-8.0gallons to fill it up.

 

see this makes no sense at all.... why is ur tanks only 8 gallons and mine is 10? I should be around 300 miles to the tank!

the mechanics said there are too many problems that can happen, they did bring up the compression, but i seriously doubt it.. the engine still is in great shape

 

The fuel tank in my car is suppose to be 11.9 gallons, but i have never put more than 8.5 gallons in at one time. By the time i hit around 290 miles the needle is on E or really damn close and that is the point at which I fill it up. I never top it off and the needle is always just below the F line when the pump stops. I use to record my milage and gallons and that is the number I came up with over a couple tanks, now I if i see 7.7 gallons and about 290 miles I know everything is ok. It sux not having a fuel warning lite.

BTW, I own a 88 CRX DX, all stock.

 

I just replaced my O2 sensor... It cost me about 29.99 at pep boys. I reset the ECU and everything, and the car feels alot smoother. I'll let my tripometer tell me how it is.

 

I remember puting in the 2 O2 sensors on my b16 but when I go to replace them what ones would I look up? Just any Single wire o2?

 

how do u reset the ecu? is it hard to do or do u need special tools to do it?

how hard is replacing the o2 plug, i haven't done it before ...

 

The O2 sensor only took about 10 minutes to install. Spray some WD-40 on it and it comes off nice and easy. Then you cut and strip a piece of the old O2 wire and cramp it onto the new one. It comes with instructions. pretty easy.

 

dood put a small jerry can in the back seat. let it go dry. then fill her right up and see how many miles u get off a full tank.

 

i just called discount auto parts, they said $50 for the o2 sensor ...

and should i try to reset the ecu ? if that's maybe the problem

shorty, what do u mean? i know how many miles im getting - and it's horrible, a small car like mine and a 90 hp engine should be getting very good... it's specs are 30 city / 34 highway when ur 10mpg less than what it should be - u realize something is wrong, and this might be an overestimate ... it's worse when im lower in gas


[Modified by SteveeeO, 10:24 PM 9/15/2002]

 

no do not spray wd40 on it if you do to get the old one off make sure that the header is free of any chemicals such as wd40 since this can ruin the new o2 sensor make sure also to use anti-sieze compound when installing the new one. Believe me I ruined a sensor by spraying it with wd40 before putting it on.