Fuel Economy

[majic]

this guy is getting decent mileage and seems like it's your type of driving..

[MajesticBlueNTO]

what do you drive now? a balls-less corolla?

you were close, he drives a balls-less civic

he's going from a 1.7L to a 2.3L....transmissions geared completely different.... OF COURSE IT WILL USE MORE GAS

[Flagrum_3]

you were close, he drives a balls-less civic

he's going from a 1.7L to a 2.3L....transmissions geared completely different.... OF COURSE IT WILL USE MORE GAS

+1, and not to mention some Gross weight gain.But I'm curious how the 2.3 versions of the 3 would do under his type of driving;( 80% highway, 100km a day)....I think he might be pleasantly suprised how well it does.


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[Broli]

just got my record on the way to mtl

did 550 km to 1 tank

that is the best i have ever done by far, man, my city driving screws me bad!!

[faibs]

just got my record on the way to mtl

did 550 km to 1 tank

that is the best i have ever done by far, man, my city driving screws me bad!!

how fast were u driving on the highway?

[pfbmgd]

you were close, he drives a balls-less civic

he's going from a 1.7L to a 2.3L....transmissions geared completely different.... OF COURSE IT WILL USE MORE GAS

Bigger engine does not always mean more gas .A bigger engine should get good mileage as it is working less .This applies mostly to HWY driving .To get good gas mileage you use torque not horsepower .A bigger motor should have more torque and work less .

[MajesticBlueNTO]

Bigger engine does not always mean more gas .A bigger engine should get good mileage as it is working less .This applies mostly to HWY driving .To get good gas mileage you use torque not horsepower .A bigger motor should have more torque and work less .

the laws of physics don't cease to exist in a bigger engine of same cylinder count. nor do they cease to exist when comparing a 4 cylinder to a 6 or an 8 cylinder, or higher.

the 2.3L 4 cylinder has a bigger combustion chamber (bore and stroke) than the 1.7L 4 cylinder. that combustion chamber has to be filled with a certain air/fuel ratio. the bigger the combustion chamber, the more air, thus more fuel.

a bigger engine may be working less (depending on many factors such as gearing, weight, friction, aerodynamics, frontal area, the list goes on and on) but the fact remains that it needs to use gas to keep it going. why do you think modern 6 and 8 cylinders (especially the V8s) come with cylinder deactivation while cruising....because less combustion volume = less gas.

[Flagrum_3]

how fast were u driving on the highway?

I think Broli likes keeping it just under the limiter most of the time



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[garboui]

one of my best tanks this season 579km with 44.5L of gas. Thats 7.68L/100km; the first third of the tank was city driving too.

So far most of my tanks have been around 8.1-8.5l/100km with anywhere from 40-80%highway.

Im going to switch to synthetic within the next change or two and see if that makes a significant difference to my gas mileage. If the synthetic will save me 0.5L/100km ill be happy because in the 5000km that i usually do between oil changes thats 25L of gas and at the current price $1.05 thats $26.25 and even up to the recommended 8k if the synthetic stays that much cleaner.. which is enough savings for me to justify switching to synthetic along with the added benifits of less wear and tear on the engine parts esp with cold winter morning starts.

[pahecko]

I switched out of winter tires and fuel efficiency is back up to 500-600 KM a tank. I found that the Mazda 3 does really really poorly in stop and go, because it seems to take alot of gas to get going.

Harder tires i guess let me roll a little more before having to gas.

+1. all i do is city and this baby is thirsty. I'm lucky if I get 400 a tank.

Does anybody, get better mileage with a cai and cat-back exhaust?

Before my intake and header i was getting 400+ so yea forget that idea!

[dentinger]

this guy is getting decent mileage and seems like it's your type of driving..

are you referring to me?? lol

[Wild Weasel]

the laws of physics don't cease to exist in a bigger engine of same cylinder count. nor do they cease to exist when comparing a 4 cylinder to a 6 or an 8 cylinder, or higher.

the 2.3L 4 cylinder has a bigger combustion chamber (bore and stroke) than the 1.7L 4 cylinder. that combustion chamber has to be filled with a certain air/fuel ratio. the bigger the combustion chamber, the more air, thus more fuel.

a bigger engine may be working less (depending on many factors such as gearing, weight, friction, aerodynamics, frontal area, the list goes on and on) but the fact remains that it needs to use gas to keep it going. why do you think modern 6 and 8 cylinders (especially the V8s) come with cylinder deactivation while cruising....because less combustion volume = less gas.

I don't think you're a physicist. Of course, I shouldn't talk... I didn't do so well in my university physics courses either.

That said... your comments aren't all that valid when you throw in a few other factors.

Think of it this way...

You've got a 3000 lb object that you need to get moving down the road. In order to do that, you've also gotta get some pistons moving up and down, wheels turning and a bunch of other stuff happening. This all takes energy, and all that energy is being created by consuming gasoline.

Gasoline has a certain amount of energy in it. The more of that energy that is used to move the car, and the less that's used to do all the other stuff, or just wasted by not even fully burning the gas, the better your fuel economy will be.

Now think of your different sized engines. It's not so much the size that matters but, rather, the efficiency of the engine to burn that gas without wasting energy. If you have a smaller engine, it may well be more inefficient than a bigger one of the same number of cylinders. That means the small one uses more gas.

How does it do this?

Well... the throttle body is a wonderful thing, and is responsible for the biggest flaw in your explanation.

Even though the bigger engine has more room for the air/fuel mixture, having the throttle plate nearly closed restricts the amount of air that's allowed into the cylinder. If you restrict the amount of air, then you obviously need less fuel to make the proper mixture. If you can use less fuel while still creating the energy you need to move the car, then you'll save gas even though the engine is bigger.

The bonus here, is that because it's bigger AND more efficient, you have the option of burning more fuel if you choose to and making even more power. Add in forced induction, and things get lots more fun.

The only real argument for a bigger engine using more fuel than a smaller one is in weight differences between the two. Both the overall weight, and the weight of the components that need to move in it to make it work. If the technologies used in both are the same, then a smaller engine should be more efficient based on the fact that there is less weight to move, and less work to do to keep the engine turning. That's why a V8 with cylinder deactivation is still going to be less efficient than a similar 4 cylinder. Those other 4 cylinders in the V8 still have to be moved up and down and that takes up energy that could otherwise be used to move the car.

Damn you, work, for waking me up early on a Saturday morning! Hope someone got something out of all this...

[Broli]

how fast were u driving on the highway?

i would say averaged at 120
some stints upto 140

I think Broli likes keeping it just under the limiter most of the time



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hahaha

only by necessity . . .

[KenYork]

25% city, 75% highway 783kms. right after an oil change.

[majic]

25% city, 75% highway 783kms. right after an oil change.

this is as useful as broli's posts..

[Broli]

yup

just like ur last post is very useful

[majic]

yup

just like ur last post is very useful

douchebag.. i was ILLUSTRATING how spewing off some random ****ing numbers is a waste everyone's time.. we can all infer from his statement that 783km is most likely when the light came on but it seems quite high.. so that's probably when he filled up.. and that would be a difference of potentially 80-100km .. so many variables.. yah i am the asshat.. thanks for coming out.. maybe you want to post more PORN on tm3..

[Broli]

lol, it was a joke retard,

maybe u need to take some happy pills in the morning

[Garu]

You two should get a room yea?

[Caz]

majic vs. Broli - 4 o'clock behind the portables in the soccer field.

[Wild Weasel]

majic vs. Broli - 4 o'clock behind the portables in the soccer field.

CRIPPLE FIGHT!!!!!

[Broli]

CRIPPLE FIGHT!!!!!

lol



and now back to your regular programing . . .

[KenYork]

25% city, 75% highway 783kms. right after an oil change.

Well that's the best I've gotten so far off a tank of gas from when the gas pump leaver stops till I filled up again. Not much traffic either, just a bit of stop and go on Hwy 7. I drive a 2.0.

When the needle was at half I had already gotten 407km.

majic, What's useful to one may not be for another.

[majic]

Well that's the best I've gotten so far off a tank of gas from when the gas pump leaver stops till I filled up again. Not much traffic either, just a bit of stop and go on Hwy 7. I drive a 2.0.

When the needle was at half I had already gotten 407km.

majic, What's useful to one may not be for another.

Ken,

fine.. maybe your post was useful to some BUT it could have packed MUCH more value if you added that 738km did not occur when the light came on but when you filled up as well as how MANY liters you filled up with.. that would be enough to get a mpg or l/100km reading which is MUCH more accurate than saying i get 700 to a tank or 400 at half way mark...by the looks of it u won't hear from me for much longer anyway.. so cheers an wicked mileage assuming you filled around 50L

[Moses]

Hey when i've got my 04 M3 last month it was compleatly stock and the milage i've got was 580km when the light went up. Now I have Magnaflow axcle back and i dont know how many km i can get on a tank now...