Anto

Okay. I'm tired of this 240 miles to the tank crap.

I've searched. Tried everything suggested.

Stock car. 1993 240sx SE with a KA24DE.

New cap and rotor.
New plugs.
Good wires.
New o2 sensor.
New thermostat, water pump and coolant flush.
New PCV valve.
New Fuel Filter.
Injector O-rings replaced.
No apparent fuel leaks.
Coolant temp sensor in resistance spec.
Cleaned IAA/AIV valve cluster via intake line.
Cleaned Air filter & Throttle body.
35 psi tire pressure.
Correct TPS voltage.
Keeping it under 3k 95% of the time.
Timing is at 21*.
Intake resonator removed.
Alignment in spec.
New drive belts adjusted to spec.
Running 0w-30 German Castrol.
Fixed faulty knock sensor harness.
Always run 91 octane Shell or Chevron gas with Lucas UCL.

EGR system seems to be fine.
No vac leaks apparent.

I've gone through each and every single one of these f-ing things. I still get 20-22 mpg.

If anyone has something I haven't covered, please f-ing post it.

Feeling like I want to stab SOMEONE IN THE FACE.

also, when I reverse, during the clutch release, the RPM's drop down considerably, and it stalls out 80% of the time. Even if I gas it a little more than usual, the idle flucuates and wants to die out.
what the f. someone please help me.

TurK

you forgot to buy a hybrid.

Phlip

What kind of driving do you do? Is this mostly city driving, or are you putting highway miles on the car mostly? I don't know what year your car is, but I would also like to remind you that you're driving a car with an engine that is likely nearing or over 10 years in age, which PROBABLY has over 100k miles on it as well, you can't realistically expect 35-40mpg, even with minor modifications. That 20-22 is better than some of us actually get.

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Anto

yeh. hybrids aren't $2700

I know this problem is fixable. I've seen people call out 25-29 MPG. My friend with his '96 240 gets 29 mpg.

Anto

I'm doing mostly highway driving. 70~ mph.

Also ran a compression test on the car. 180 across the board.
I'm not expecting some crazy MPG, but from the factory, aren't they rated at 23/28?

Cutless01

my 95 puts down about 22-25, most I ever get is about 27 on long roadtrips with cruise on at about 85mph. But then I get shitty gas mileage because I tend to find it necessary to pretend Im at a drag strip at every red light, and I simply must beat the old lady next to me to the NEXT red light, or the monsters will eat me!

yokotas13

dude
quit bitching
i get 270 KM per tank STFU lol

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Phlip

I have yet to see a car with 100k or more miles that still conforms to ANY of it's factory ratings, I still contend that your 20-22 is no anomaly.
... my 25-30, on the other hand, is and did nothing special to get to it, it just happens.

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Anto

ha
haha
hahaha



*those laughs are really tears.

Anto

bleeeeeh. so i'm stuck with crap MPG.

well. time to turn this car into a track whore and get a 92 civic hatch with a D16 SOHC non-vtec motor. 40 mpg! haha.

Crap. if there really IS nothing I can do about this,
I want to pee in someone's mouth

specifically the guys who get more MPG than me.




...and the fire department is outside my house. at five in the morning.

TipStylez

Wait untill you turbo it =]

vanish1

my 96 240 I once got 420ish miles from a highway trip one time, most of the time im in 300s tho

Quigs

Do you really expect anything more than like 25 mpg from an S13??? I'm pretty sure our cars weren't built for gas efficiency. Especially since in '93, gas wasn't nearly a big of an issue as it is now.

nonissan

while i don't think i would cry over 22mpg, my s13 was getting over 30mpg hwy when she blew up 185k on the clock... my sr usually gets close to 30mpg too. that's running 85-90mph for 5 straight hours.

DaPCWiz

22... I get like 26-28 reliably... usually closer to the 28 mark. I've done 31 once. I daily drive on the highway 70-75 mph. The car was getting 21-22 when I bought it...

I did intake/headers/exhaust/high flow cat/ghetto rigged rear o2 sensor (not actually in the exhaust)/manual swap/tune up/z32 fuel filter/28* timing/93 octane/cleaned out iacv/MAF/AIT sensor/seafoam

135k miles on her now, 119k when I bought her

my old S14 (factory 5 speed) used to get about 27 mpg regularly as well... it had an intake.. and that's about it.. 50k miles when I bought it... had it till 75k

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FaLKoN240

I never get good mileage for that long, it usually lasts like 1500k after a fresh oil change, after that, the car goes to shit. I have your problem, but I haven't done much to rectify it, not as much as you anyways.

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orion::S14

What about transmission and diff gear oil? There's A LOT of drag in those parts, when everything's not lubed up with the good stuff.

MT90 for the trans, 85w90 for the diff (I like Mobil 1).

- Brian

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drift freaq

well your mileage is not that much off the mark. If your running your air you will lose at least 2-3mpg. I know these things for a fact. After running single cam cars and dual cam cars back and forth between los angeles and san francisco I can say the average mpg for our cars is 25mpg, especially if your running your air. If you don't run air and have an extremely clean engine i.e. good shape you can pull 27mpg. Thats the highest I have ever seen.
On top of that I never run 91 octane gas its always 89 or even 87. Under extreme loads i.e. its hot out with the air running 87 will cause minor detonation. At that point it becomes time for the 89. Overall though your ecu will totally compensate for not running 91 octance its pretty much not needed on a stock engine.
Now if you go Turbo, 91 is the requirment hands down you have no choice. Heh there is something to be said about driving a mildly modified stocker for the sake of buying cheaper gas.

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Gnnr

What tires do you have and what is the max psi rating on your tire? Also you using the stock wheels? Cruise control really helps too. And I guess if you're really anal you can save some power by using an e-fan?? dunno...

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drew935

Anto,
sounds normal to me.
I get 20-22mpg with 89octane at 76. You might to run seafoam to clean out the carbon deposits/ buildup. Other than that. Why complain about 20-22mpg?
Make more $ and don't worry about mpg. We drive a sports coupe.

Btw, the best I may have gotten was 24-25mpg. But I don't care much about it as long as the car runs fine.
14yr 240 SE 5spd compared to a 06 Acura TSX = SAME MPG = Engine in good condition

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5t341tH

hmm your 20mpg still sounds good
my whole tank gives me only 180miles
i noe thats crap
its an auto too and i drive normally, keeping it under 4k

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altitude

Can your rear brakes be sticking?

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trsilvias13

drive at 55pmh and you will see a difference. DO not use A/c, you will see a difference. Let it roll in neutral more often. There are technique where you can get you mpg up. I read it in the newspaper. There a contest for this kind of thing. I think it call hypermiler or soemthing like that. There is a forum for that too somewhere.

DaPCWiz

yeah... u'll be surprised how much of a difference keeping your windows closed makes too. I try to keep my car under 3k rpm as much as possible.

my mpg in the summer is significantly lower when I have windows open / use ac / etc

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trsilvias13

For those who wants to test this theory out, no need, mythbuster already has.

DaPCWiz

i haven't seen the mythbuster episode. But from personally driving 100 miles a day, doing about 75-85 mph (i tend to drive faster in the summer... ::shrug: I get like 23-24 mpg windows down, 26-27 windows up. I didn't find the a/c to make a HUGE difference though.

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~4N~

Take out the A/C, gut it, and shift at 2.5-2.7 krmp. I get over 30 mpg.

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SoSideways

Yeah, I have an SR w/ FMIC, downpipe, test pipe, catback, and Walbro fuel pump, and I got over 300 miles when I fueled up (I only let my gas tank run down to the last 1/4 tank mark).

That was not boosting at all city driving and shifting at 2700rpm.

And BOV never opened

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ixfxi

my KA was never known for good gas mileage. KA's in general suck balls in that sense...

replace KA with SR, get more power and better gas mileage.. amazingly enough.

regardless of what car i drive, i never care about efficiency with gas mileage.. its just silly. roll up your windows and you remove yourself from being able to sense other drivers. down-tune your driving and feather the gas, you are now limping on the road and driving like a pansy. i mean, to me... where i position the car on the road and what rpm i am at, is a huge safety benefit. it now only allows me to be away from certain drivers, but keeps me at a powerband that allows me to avoid getting hit (by a woman driver). :-)

HalveBlue

Empirical evidence aside, most studies I've seen (or at least heard about) have shown very little to no difference in gas mileage when windows are rolled down as opposed to rolled up.

But hey, if you think it makes a difference, more power to ya.