At least with the V6 you get more fun fun fun! :gitara: :banana:

 

Hi volkan,

First off, I think that's the first time I've heard of the needle moving downwards overnight while the car is parked. And since you seem to be absolutely sure of it having marked where the needle was and where it is the next morning, I think it's best you have your dealer check it out.

I also had the I4 once and neither it nor the V6 are exceptional in gas mileage. However, even the I4 is quite zippy for it's size and it's not a small engine either.

Just curious, how many miles have you put on your car? Gas mileage seems to get better as you put on the miles so in case you're still low on it, have patience - you'll see better numbers.

If you want to be sure this early, again, you're probably better off having your dealer take a look at it.

Good luck!

-N- :thumbsup:

 

...So what kind of gas mileage are you actually getting, volkan? We need a number to go by....

 

the sonata is not an econo car if you wanted that you should have gotten an accent. its a big car and heavy also you got a 4 cyl with around 170 horseys
my 1978 monte carlo with a 305 8 cyl had 125 so it sips a bit o gas.

 

I get about 300 kms with $40 gas (38-39 Litres) with AC ON.

I get about 350-370 kms with the same amount of gas but AC OFF.

including some "quick" starts.....
(07 V6 engine)

 

First off, take a deep breathe, and relax, now exhale.

OK, lets get some facts here.

How many miles, and at what speed are you driving, and how many gallons does it take to fill it up. There is no other way to figure gas milage--the position of the gauge needle does not matter....the number produced by the on board computer are also irrelevant. ( unless someone is stealing gas when you park)
Fill up the tank, and record the miles. Fill it up again at the same station with the car sitting as it was before. We want to eliminate all variables. You probably want to average several tankfuls.
Post back some real numbers, and then we can see if you are getting nominal values or if there is something wrong.
" $20 every couple of days" may be great, or terrible. If you drive 200 miles a day, that would be great mileage. If you drive 5 miles a day, that would be teriible.

Give us the facts, please.

 

Originally posted by MiamiLX@Sep 24 2007, 10:27 PM
At least with the V6 you get more fun fun fun! :gitara:  :banana:

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Oh good. I thought you was going to tell him this has been covered, do a search on it.

Almost sounds like someone is siphoning the OP's gas, doesn't it? Or maybe has a fuel leak. All it takes is 4-5 drops a minute to make your mileage really suck.

 

Originally posted by normandelli@Sep 24 2007, 11:37 PM
Just curious, how many miles have you put on your car? Gas mileage seems to get better as you put on the miles so in case you're still low on it, have patience - you'll see better numbers.

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I would have to agree with this. Also, after taking her for a nice long road trip seemed to improve her mpg. She just needed to stretch her legs out a bit. What type of driving do you normally do, city or highway?

 

Originally posted by ironman@Sep 25 2007, 08:54 AM
I would have to agree with this.  Also, after taking her for a nice long road trip seemed to improve her mpg.  She just needed to stretch her legs out a bit.  What type of driving do you normally do, city or highway?

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I agree with this statement. Although I have a Santa Fe instread of a Sonata after a nice long road trip (Pushed it at some points) I broke the engine in a little more and it seems to get a little better MPG. The jury is still out but 3 days after my trip my MPG trip computer reads 21.x MPG instead of the 17-18 I had previously.

Most of my trips are short in comparison.

 

Originally posted by MS Fowler@Sep 25 2007, 03:44 AM
First off, take a deep breathe, and relax, now exhale.

OK, lets get some facts here.

How many miles, and at what speed are you driving, and how many gallons does it take to fill it up.  There is no other way to figure gas milage--the position of the gauge needle does not matter....the number produced by the on board computer are also irrelevant.  ( unless someone is stealing gas when you park)
Fill up the tank, and record the miles.  Fill it up again at the same station with the car sitting as it was before.  We want to eliminate all variables.  You probably want to average several tankfuls.
Post back some real numbers, and then we can see if you are getting nominal values or if there is something wrong.
" $20 every couple of days"  may be great, or terrible.  If you drive 200 miles a day, that would be great mileage.  If you drive 5 miles a day, that would be teriible.

Give us the facts, please.

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Quoted for truth.

Give some numbers before you get your shorts in a twist.
Keep in mind the fuel may be sloshing around while the car is moving, and sitting overnight it would settle, and possibly read lower.

 

If your gas is going down over night have the fuel injectors checked. The fuel system is under pressure and a bad fuel injector can leak gas into the intake manifold.

 

wouldnt you be smelling gas if it were leaking?

TBH, i get about 27.7 MPG with my V6.. but I also do about 90-95% highway driving, and i have 30k miles on it....

if your gas tank is going down significantly when you dont drive it, you are either getting it stolen (not unheard of) or it is leaking... there would be no other explanation for it.. (settling gas wont make it go down by 1/4 of a tank or anything)..

 

maybe you are parking on a tilt? Btw! I'm responding on my Ipod right now! I love it!

 

Maybe we should all actually WAIT till we get some VIABLE INFO from the OP, as to his mpg reading?

 

mix of city and hwy im getting about 490km or so on a tank and i dont take it easy on the car either... then it fills up about 52 litres... good enough for me on the v6

 

Thanks everyone for your replies!!

I will have numbers once I get some gas tomorrow. For the record, I bought the car used from Budget...I bought it at 24,000, there is now 36,000 on it.

I will post more tomorrow once I have the numbers for you all.

Thank you all very kindly!!

Volkan

 

Buying from a rental company is ok. :thumbsup:
I bought mine as a Hertz auction unit. :trophy:
The only problem I have is it wants to head to the airport now and then. Must be to watch the planes come and go. :grin:

Have you dealer check it out. You do have a warranty.

 

Originally posted by volkan@Sep 25 2007, 06:52 PM
I will post more tomorrow once I have the numbers for you all.

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Most owners that get poor mileage either drive a lot of 75+mph, and/or idle a lot in traffic. If the car is driven mainly in the sweet spot, 50-65mph, it usually gets ~26mpg for the V6 and ~30mpg in the I4.

 

someone told me that the sweet spot was more around the 120kph (75mph) range... oh well.... i get around 22 mpg in probably 90% rush hour driving.

 

once i did a 30 mile round trip on the hiway with very light traffic n i varied from 80-110mph n when i got home the mpg was @ 22. the 4 banger probly would of had worse milage @ that speed right?

 

Originally posted by bobad@Sep 26 2007, 08:59 AM
Most owners that get poor mileage either drive a lot of 75+mph, and/or idle a lot in traffic. If the car is driven mainly in the sweet spot, 50-65mph, it usually gets ~26mpg for the V6 and ~30mpg in the I4.

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erm... i have to disagree with that...

i drive 75-80mph every day 35 miles each way back and forth to work.. i am averaging 27.8 MPG... (V6).. much over 80 it might go down a bit though... i think the "sweet spot" for the V6 is in between 65-75, not 50-65...

you definitely get worse mileage in stop & go traffic....

 

Originally posted by ddix1026@Sep 26 2007, 06:48 PM
erm...  i have to disagree with that... 
i think the "sweet spot" for the V6 is in between 65-75, not 50-65...

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Find a long stretch of highway with light traffic. Lock the cruise at 55, 65, and 75 MPH, re-setting the trip tech for each run. You may be surprised!

The increase in wind and rolling resistance from 55-75mph is huge.

Even though an engine is tuned for peak efficiency at (example) 75mph, the greatly reduced power needs of running at 55mph easily trumps it.

The wind and rolling resistance from 70-80mph is again huge. The increase is almost as much as it is from 55-75mph.

Unfortunately, the laws of physics apply to the Sonata.

 

Originally posted by bobad@Sep 27 2007, 09:08 AM
Find a long stretch of highway with light traffic. Lock the cruise at 55, 65, and 75 MPH, re-setting the trip tech for each run.  You may be surprised!

The increase in wind and rolling resistance from 55-75mph is huge.

Even though an engine is tuned for peak efficiency at (example) 75mph, the greatly reduced power needs of running at 55mph easily trumps it.

The wind and rolling resistance from 70-80mph is again huge. The increase is almost as much as it is from 55-75mph.

Unfortunately, the laws of physics apply to the Sonata.

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well, i guess the part that i would disagree with would be the fact that at 50-65 (supposedly the "optimal" speeds), a V6 gets ~ 26 MPG... as i mentioned, i drive 75-80 and average 27.8 mpg.... that's a lot faster than the supposed "optimal" speed and a lot higher than the gas mileage you mentioned it should normally get....

physics or not, your numbers seem a bit off (and this is, of course, just MY experience.. others may have a different experience)

 

The problem with driving 55 is getting rammed from behind by inattentive morons.

The accepted speed of traffic on my most travelled highway is 80-90mph.
55 would get you killed, forced off the road, or ticketed for causing a safety issue on the highway.

 

ddix, are you traveling at speed with a lot of traffic going the same speed? If so that might cause the paradox. A string of cars will all get better mileage traveling with each other because the wind drag will be lessened - even the first car gets some benefit.

That said, at somewhere between 35 and 40 mph on level ground your mileage will probably peak and then it only gets worse as you go faster. The increase in fuel consumption gets steeper as you go faster and faster. That's physics... can't change that, but moving with fast traffic helps, although it presents dangers of its own. Watch road cycling to see the benefits (and risks).