fuel economy test DA9 LS integra

I have a 1991 Integra LS manual with the 1.8. Before someone cracks the shi*s at me for not searching.. I am not asking how much my car uses in petrol to the tank(about 10 litres per 100km) i wish it was more like the 8.5 litres that some sources claim it should be. But i would like to know why the car seems to be super economical for the first half of the tank and then crap for the second half. Every time i fill up my tank it will take a good 100 km before the needle even moves past 'full'. When the needle says half a tank, its usually at around 285 kms or so. but after that the needle is much quicker to go down. Now im on about 405 kms to the tank and its already quite close to the empty line. Are the needles a little innaccurate or do these cars run better on a fuller tank? By the way this tank i havent been driving it hard at all... Last time i got about 480kms to the tank.

inaccurate fuel guage. I don't think the ammount of fuel in the tank makes any difference. Why don't you just fill up every half tank and see how much fuel it takes, maybe you're onto something, but I doubt it.

ALL DA9's are like this.. its just the gauge
get used to it ;)

yeh. i did read one guy mentioned the same thing. cant remember where. nothing to worry about, i just thought its a bit wierd.

its just a case of knowing approx how many kms ur tank does

mine was also like that.

i always assumed that maybe the fuel tank was bigger up top, and smaller at the bottom, lol.

mines lik dat 2, i get lik 250kk's out of the top half of the tanks an only lik 150-200k's out of the bottom half, depend on how i drive;)
but thats drivin pretty good..
i usually get lik 400-500 out a tank..but yeah i notice dat 2, and dats y everytime i get near half i fill up again:)
is it tru dat we got a 50L tank aswel?
but u can go above the wat the meter measures @, so ur probl getin more, lik an ova fill...or somethin
rit?

I have the same problem, sometimes im like man that must be a good batch of fuel or im not givin it as much stick, but like all the other members said: its jus an inacurate guage

common problem, but after a while you get use to knowing how much fuel you have got in your tank. The other day i got 567km on a tank of fuel with 5 litres left.

hay, is it just me or dont, i mean all DA9s dont have a fuel warning light?:confused:
coz im sure i dont have 1, unless i ve never seen it come on....:eek:
but yeah, i dont evan hav a door sensor light either, lik they(Honda) giv us all electronics but forget the basics,lol; i no it only 2 doors, but every car got that light @least:p
so yeah
any1 got a fuel light of some sort?
or is not 1?:confused:
sory if this is off topic....

wtf 567km off a tank wif 5 L left

i am lucky to get 380 in my dc2

farkkkk

I get the same problem. I'm driving along, look at my gauge, and start having a great day 'coz I'm at 1/2 and have driven 300ks....then the next thing I know I'm at empty (The E mark, 40L used and with the 10L left in reserve) and at my regular 480-520km.

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Originally Posted by Mystic_Integra

hay, is it just me or dont, i mean all DA9s dont have a fuel warning light?:confused:
coz im sure i dont have 1, unless i ve never seen it come on....:eek:
but yeah, i dont evan hav a door sensor light either, lik they(Honda) giv us all electronics but forget the basics,lol; i no it only 2 doors, but every car got that light @least:p
so yeah
any1 got a fuel light of some sort?
or is not 1?:confused:
sory if this is off topic....

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you should have a door sensor light.. yours is broken ;)
import XSi's only have fuel lights

i dont think i hav a door sensor light..lol:confused:
i no i have a boot light..
but yeah, if one of ma doors is left open, the only light i get is the light on the interior roof, so yeah
ill check again, 2nit
im i the only 1?
or does every1 hav 1?:confused:

i dont got one either...

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Originally Posted by NSPYRE

i dont got one either...

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got wat..?

a door sensor or fuel light?

what do you mean by door sensor ??

I must really have a dodgy fuel gauge or bad o2 sensor or something cos im only getting about 360 km out of my tank.... and my fuel gauge does not go all the way to full is like almost there but not quite even though the tank is full..

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Originally Posted by Mystic_Integra

got wat..?

a door sensor or fuel light?

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both, haha

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Originally Posted by FR33K

what do you mean by door sensor ??

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door senosr, as on the dash it shows that one or both of ur doors arent close, or are still open, that light..coz i dont have 1
an i dont think the bulb it out either, im pretty sure i just dont have one..lol:(

nah man no door sensor, ur thinkin of the preludes. Nothing lights up on the dash when the doors are open.
Yes the interior light comes on, but thats all.

No fuel light neither on the LS, again thats the preludes.

As far as im aware i dont think any DA9's have a low fuel light - at least the australian spec ones anyway

With my fuel consumption on my teg, the first half of the tank usually gets about 300kms, but then the last half gets less - at least according to the the fuel gauge (which is normal with LS tegs from what i've heard)

From the 50litre tank i regularly average approx 450kms with a few litres to spare. Although in a trip from sydney got 689kms out of a tank with 3litres left! And 585kms with a few beach runs to the penninsuala last summer (not driving conservatively either!)

common problem same with my 90 accords second half of the tank drinks like ur car got turbo =/

nah when my door opens the light on the dash goes off. It is a pic of a car with the boot open. So It goes off whenever my doors or boot is open

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Originally Posted by stanleym

wtf 567km off a tank wif 5 L left

i am lucky to get 380 in my dc2

farkkkk

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Agreed.. =] i only get like 400 - 450 ks if im lucky. and im running on a 1.6 litre -.-

who cares about the fuel light. as soon as it gets to the red line fill it up, instead of using the lil bit left over,i heard its bad for the engine neway.

Sorry to go off topic, but here I go:
Running low on petrol can suck gunk from the bottom of the tank and into the fuel filter or injectors, which I'll spare you the details of why this is a really bad thing. Also some cars (cars with pumps inside the tank) often rely on a certain ammount of fuel in the tank to cool the fuel pump. Your pump could overheat and starts a fire in the fuel tank. In which case you do need the right mix of fuel and air to cause an explosion, but it is possilbe.

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Originally Posted by max06

yeh. i did read one guy mentioned the same thing. cant remember where. nothing to worry about, i just thought its a bit wierd.

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G2IC.com they made a whole post about this

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Originally Posted by IZY-10

nah when my door opens the light on the dash goes off. It is a pic of a car with the boot open. So It goes off whenever my doors or boot is open

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You've got an after market alarm don't you? It's the easiest way to wire them up in a DA9 hook the boot and door circuits together, only problem is the boot open light comes on when the doors are open, and the interior light comes on when the boot is open, which I actually like anyway.

All old hondas that I've come across have the magic fuel gauge. No idea why, just get used to it and live with it, my daily's gauge can move about an 1/8 of a tank randomly up and down at any point, which is ****ing annoying and has already cost me 1 fuel pump, well it will when I get around to fixing the ****ing thing.

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Originally Posted by gumbs

You've got an after market alarm don't you? It's the easiest way to wire them up in a DA9 hook the boot and door circuits together, only problem is the boot open light comes on when the doors are open, and the interior light comes on when the boot is open, which I actually like anyway.

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yeah you are right. i like it this way as well

i didnt have any probs when i had my DA9.. sounds like a guage problem..

i only get around 400 from a tank and wtf fuel light? i havent read all the posts but my Teg dont have no fuel light (ive ran out of fuel 4 times :\)

on my old engine i got 400, and on my NEW engine i got 400 too :\

i get about 500-520 out of a tank and run on vortex and i don't have a door light sensor on my dash to say my doors are open only a boot one and for a fuel light i only think the usdm acuras have them and the xsi or something similar to that

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Originally Posted by Jon_51

Sorry to go off topic, but here I go:
Running low on petrol can suck gunk from the bottom of the tank and into the fuel filter or injectors, which I'll spare you the details of why this is a really bad thing. Also some cars (cars with pumps inside the tank) often rely on a certain ammount of fuel in the tank to cool the fuel pump. Your pump could overheat and starts a fire in the fuel tank. In which case you do need the right mix of fuel and air to cause an explosion, but it is possilbe.

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^^ this is partially right

as to sucking gunk to the injectors thats why there is a filter to stop the gunk from reaching the filters, worse case you would have a clogged up filter and probably wont get the desired pressure out of the system, or the car just wont start if the filter is clogged up hard thus not allowing fuel to flow up to the injectors, trust me on this one I'm speaking from experience coz it hapened to my car.

and as to the tank exploding I dont think it could, what would actually hapen is that the fuel pump will run hot and most likely sease up and stup working, but by the time this hapens you most likely hear the pump making whynning sounds then next thing you know the pump is farked.

^^this sounds right to me btw lo_n_sxc i see your old car like every week!

i just finished off what i think is close to a full tank and got 520km with some spirited driving every now and then. if i drove like a granny i should be able to get 550km+.

this is using optimax. i notice that if i run different branded 98 octane fuel i would get less than if i used optimax.

running just plain unleaded just normal driving mix of freeway & city
i got like 480kmz and filled up around 43ltrs so i had 7ltrs left.

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Originally Posted by LO_N_SXC

^^ this is partially right

as to the tank exploding I dont think it could, what would actually hapen is that the fuel pump will run hot and most likely sease up and stup working, but by the time this hapens you most likely hear the pump making whynning sounds then next thing you know the pump is farked.

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I'm the first to say it's unlikely. But..
I've seen a fuelpump pulled from a tank which had it's wires' insulation burnt off. So there was a fire in the fuel tank at some time. It just needed the right mix of fuel to air and yeah it would've exploded, but a dead pump sucks enough alone. Btw if the fuel filter stops ALL the gunk going to the injectors why do people bother to have their injectors cleaned? I have seen a rotor eat itself alive due to gunk in the fuel filter and I've seen clogged injectors in a commodore. Both directly from running out of petrol.

Old Post but I thought I post up my results as well..

I recently bought a DA9 as an addition to my Honda Family :D

in my first week, I'm doing 8.19 Litres per 100km... I'm on my second week now and I've just fitted one of my spare K&N pods in it and I'll see how the consumption goes...

congrats on getting a da9

i would get about 350 max outta my dc4, although ive got 330 on 3/4 of a tank, i usually fill it up at 3/4 tank.

i think coz the fuel gauge max point only show up to a certain point of the tank..but when u fuel up u can go way above that point, so it seems like u have more fuel for the first half the tank....thats the most logical reason i've came up with...outta 4 DA's i've had in the past is the same

I've just done calculation on fuel economy for my DC5S

Driving style is,
- 30% Hitting VTEC/High RPM
- 30% Highway
- 40% City/Short burst

I got 378km out of 33.78litres of 95RON, which equates to 10.98L/100k or around 9L/k

Not bad....

i thought he was just asking about DAs

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Originally Posted by max06

I have a 1991 Integra LS manual with the 1.8. Before someone cracks the shi*s at me for not searching.. I am not asking how much my car uses in petrol to the tank(about 10 litres per 100km) i wish it was more like the 8.5 litres that some sources claim it should be. But i would like to know why the car seems to be super economical for the first half of the tank and then crap for the second half. Every time i fill up my tank it will take a good 100 km before the needle even moves past 'full'. When the needle says half a tank, its usually at around 285 kms or so. but after that the needle is much quicker to go down. Now im on about 405 kms to the tank and its already quite close to the empty line. Are the needles a little innaccurate or do these cars run better on a fuller tank? By the way this tank i havent been driving it hard at all... Last time i got about 480kms to the tank.

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I highlighted your question for everyone.

The car should have better fuel economy on an emptier tank due to weight. That is all.
so 2 half to empty fills will get you further than 1 full fill. But you would also have to factor in deviating to a petrol station.

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Originally Posted by ACTI0NMAN-1

I highlighted your question for everyone.

But you would also have to factor in deviating to a petrol station.

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so...does that mean my theory could be correct? hahaha:p

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Originally Posted by ACTI0NMAN-1

I highlighted your question for everyone.

The car should have better fuel economy on an emptier tank due to weight. That is all.
so 2 half to empty fills will get you further than 1 full fill. But you would also have to factor in deviating to a petrol station.

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i find when the needle gets halfway i have about 20litres left.

hey guys

have you ever turned upsided down a full 2l bottle of water and found that it takes more time to empty out the first half than the second half? try it, full bottle will always take longer to empty to half way than a bottle filled to half way and emptied at the same time, same happens to your fuel tank, its about vacuum, the more air you have in a bottle the easier it is for the remaining liquid to get out..

also to add to this when your car gets to half tank you have more air in the tank, that allows the fluid to shake and swirl about more than it would in the confinements of a full tank, making more gas fumes and more pressure...

with one way out its actually trying to push past your pump making your car less efficient, put in a new pump, it should better this. but not eliminate it.

it happens to every car, older cars its more noticeable though.

i had little to no toys growin up.. plenty of bottles though!

cheers will

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Originally Posted by Runt

hey guys

have you ever turned upsided down a full 2l bottle of water and found that it takes more time to empty out the first half than the second half? try it, full bottle will always take longer to empty to half way than a bottle filled to half way and emptied at the same time, same happens to your fuel tank, its about vacuum, the more air you have in a bottle the easier it is for the remaining liquid to get out..

also to add to this when your car gets to half tank you have more air in the tank, that allows the fluid to shake and swirl about more than it would in the confinements of a full tank, making more gas fumes and more pressure...

with one way out its actually trying to push past your pump making your car less efficient, put in a new pump, it should better this. but not eliminate it.

it happens to every car, older cars its more noticeable though.

i had little to no toys growin up.. plenty of bottles though!

cheers will

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I understand what you are saying, but the actual pressure in the tank isnt enough to make a drastic effect on the fuel economy. infact it would be so minute i doubt you could record it.

the fact that the fuel that leaves the tank is so much less than water that POURS from a bottle...i seriously double it'll be noticeable at all..ur injector will still pump the same about of fuel whether is full or half full tank...

meh....

I realize this, bottles of water, just a visual aid...

either way, my car is completely stock mechanically, im getting on average 380k per tank on vpower, thats pretty poor.

i need to service it.. pump, fuel filter, air filter plugs, should make a difference.

does anyone have a proper explanation for the second half rapid use fuel mystery???

until i see other wise i dont think im far off.... i could be way off... which is more than likely the case!!

change ur o2 sensor.. it will improve your fuel economy :thumbsup:

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Originally Posted by Runt

meh....

I realize this, bottles of water, just a visual aid...

either way, my car is completely stock mechanically, im getting on average 380k per tank on vpower, thats pretty poor.

i need to service it.. pump, fuel filter, air filter plugs, should make a difference.

does anyone have a proper explanation for the second half rapid use fuel mystery???

until i see other wise i dont think im far off.... i could be way off... which is more than likely the case!!

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380?!?!? thats pretty bad man...get a look at it soon..i get around 480 average...

just wondering why some people use premium - I thought that our cars are tuned to run on 91ron (as it says in the handbook) and unless you advance the timing, there would (should) be no noticable difference to power. You may go a little further but seeing as the ignition is set to run 91ron (ie more retarded) it seems like a waste of money, espec if your only getting 380ks from a tank of premium!

ps I often run to 600kms and often have 5-6litres left, but my car is serviced regularly. (and im usually driving in the power band)

I get about 500 around town, with a bit of what they call "spirited" driving.

I get 9.21 litres per 100kms now.. Up from my previous 8.19 LOL!!! That's about the same as my Euro....

I get pretty much spot on 10L/100km, 80% city driving, 100% spirited.

You don't use the second half quicker, you're just being fooled by the gauge into thinking that half way means it's half full.

Meh... 91 feels worse than it does on high octane... thats pretty gutless.
i got 450 once with heaps of freeway driving!

i guess 380k is pretty good for me considering i used to drive a turbo that would get me 300max!

i get around 300-350 per full tank of ultimate...it sucks

Does anyone know what these cars were supposed to get out of the factory?

Both mine have average 9-10l/100km in the 'burbs and 8ish on the highway. I'm contemplating doing a full work over on all the basics which could be causing the shit fuel consumption. An 1100kg car with less then 100kw shouldn't be using 10 per hundred. My mums camry uses 9 :(

i just filled up tonite..and realise i did 520km....come to thinking of it...its averaging about 450-500+...somehow its getting better than when i first got the car...