[BobMs_wht2k2]

ok... let's look into a little reality here. I opened this:

Turned to section 9-1 for specifications and found this:

Although, I never had to go that far as it's also on the back cover:

So according to your owners manual the car only holds 14.5 gallons. That is no longer disputable. You're trying to make us believe that you got an extra 1.65 gallons into the tank. Lets look at some other facts. The One US Gallon = 231 cubicinches ( http://www.metric-conversions.org/volume/us-liquid-gallons-to-cubic-inches.htm).Now, the filler neck is approximately 14 inches long from the top, and about 1.75" in diameter. So the volume of it works out to be about 33.7 cubic inches(Pi x Radius squared x height). Now, we know that you need ~381 cubicinches of volume to fit that extra 1.65 gallons of fuel, so right now we're about 348 cubic inches short. The fuel lines will have even less, considering their ID to be about .25", but they're about 12 feet long.... but they only net you another ~7 cubic inches. So where did that extra fuel go? No where. You never recieved it. PEriod. Physics don't lie.

Then, flipping through I notice this:

So, Hyundai not only agrees that the car only holds 14.5 gallons, but it also warns you to not over fill past the shutoff. Not only them... but here as well: http://www.epa.gov/donttopoff/
So no, it's not a "myth", it's FACT. Proven throughout the automotive world. If you paid for 16.15 gallons on your Elantra, you were ripped off.

So far you're 0 for 2. Now, as for getting 37mpg, or back when it got 38mpg, I don't give a flyting **** if you believe me or not. IT's the truth and MANY other members have also seen similar results. Now, just because you drive like a ****ing moron and can't keep it to a reasonable speed, nor able to not floor the accelerator on every take off doesn't mean everyone else in the world is as clueless and immature as you. Do I really need to go back through this forum and point out all the times you talk about driving fast, accelerating fast and what not? I can if you need me to. But from what I, and many others, have found out over YEARS of testing and trying is that keeping the tach below 3200rpms, light foot on acceleration and slightly over inflating the tires WILL net you above EPA highway results. The more time you spend stopped, be it stoplight, traffic, whatever the worse the economy gets. That is a FACT.

Now, if you'd like to know how to drive a little better and get better economy I suggest you go here: www.ecomodders.com

 

[Munky]

Aw snap, son!

 

[NovaResource]

So according to your owners manual the car only holds 14.5 gallons. That is no longer disputable. You're trying to make us believe that you got an extra 1.65 gallons into the tank. Lets look at some other facts. The newer 1 gallon milk jugs measure out at 10 inches tall, and 7inches square. That means that one gallon of liquid requires 490 cubic inches of volume(lenghtxwidthxheight=volume).

I agree with your logic here but your numbers are off. One US gallon equals exactly 231 cubic inches, not 490 (Google "gallon to cubic inches").

Now, the filler neck is approximately 14 inches long from the top, and about 1.75" in diameter. So the volume of it works out to be about 33.7 cubic inches(Pi x Radius squared x height). Now, we know that you need ~808 cubicinches of volume to fit that extra 1.65 gallons of fuel, so right now we're about 775 cubic inches short. The fuel lines will have even less, considering their ID to be about .25", but they're about 12 feet long.... but they only net you another ~7 cubic inches. So where did that extra fuel go? No where. You never recieved it. PEriod. Physics don't lie.

So an extra 1.65 gallons would be 381 cubic inches, not 808 cubic inches. So he's only 347 cubic inches short instead of 775 cubic inches. Bottom line, your theory is correct that he couldn't get that much extra fuel in the tank.

 

[BobMs_wht2k2]

^ It was the gallon that was bothering me.... I knew the rest of the math was correct. I merely measured a gallon of milk. Figured that woudl get me close. Regardless, he's 89% short of the required space to put an extra 1.65 gallons.

Basically, it's physically impossible for that much gas to fit into an Elantra's fuel system. You could put some in a gas can and put that in the trunk I guess... that would be about par for the course with his concept of how fuel mileage is derived.

 

[mtlelantra]

if you are getting 37 miles to the gallon, why can't hyundai produce a car that today delivers that mileage? Come on give us an answer?

Did you really just ask that? reported mpgs by car manufacturers are estimates based on a set of guidelines set out by the EPA. Run on, essentially, a dynamometer to similate city and highway driving conditions. It's a SIMULATION.

 

[BobMs_wht2k2]

^ dID You read any of the other bs he's said?

 

[exdtuner]

I had all intentions of staying out of this but evilcalvin I really don't understand what's so hard about getting this. I've known how to calculate gas mileage long before I knew how to drive a car.

 

[mtlelantra]

^ dID You read any of the other bs he's said?

unfortunately... I'll never get that part of my life back...

 

[Silentwolf]

Glad Bob took up that baton cause i wasn't even going to bother with the explanations.

 

[BobMs_wht2k2]

^ It was a slow day at work. I had the time. :abovelol:

 

[robs02elantra]

466 miles yesterday. Had 3.5 litres left in the tank when I filled up.

 

[BobMs_wht2k2]

Another 400mile tank today. I'll fill up at lunch.

 

[evilcalvin]

I checked the pumps record of Weights and Measures to be accurate. I have gotten more than 14.5 gallons in my tank REGULARLY!!!! How am I schooled by you. you think you can accurately tell how many gallons you used on a tank of gas. Thats insane. Explain why Hyundai doesn't make a car today that gets your gas numbers with fuel prices on the rise and competition for fuel economy the big concern of manufacturers.
http://autos.yahoo.com/carfinder/?sort=msrp&sortdir=asc&num=15&make=Hyundai&expanded=make

 

[BobMs_wht2k2]

WE just showed you how it's physically impossible to put more than 14.7 gallons into an Elantra, and you STILL want to stand by that?

So you really don't understand that you fill up, drive, then fill up again and the amount of fuel you put into the car is the amount of gas you used? Really? You don't get that?

 

[robs02elantra]

By the way, the numbers that Hyundai, and other companies come up with, are not the absolute most that the car will get. The number is a conservative estimate based on tests in 2 different locations in the USA, each one with a different climate and elevation. When you're outside of those two test areas and scenarios, you can get better or worse mileage. It also takes into account driving styles; hence if you drive like an old man, you can get better numbers than advertised.

 

[evilcalvin]

so w/o proof Bob this is a opinion. I will respect your opinion.

---------- Post added 09-24-2010 at 09:37 AM ----------

14.5 gallons of gas divided by 500 miles doesn't get you 38 miles to the gallon. also to get the 11.8 gallons used, did you drain the tank? to figure it out. If you can explain this clearly I am all ears. I asked James to create this poll; my idea, ask him. I wanted facts, not fiction

 

[NovaResource]

prove that your car and the other bad math men here get better mileage than Hyundai says the cars are capable of

Read and learn:
http://green.autoblog.com/2010/06/23/2011-hyundai-sonata-1-065-miles-on-16-07-gallons-66-285-mpg/
http://www.elantraxd.com/forums/showthread.php?39539-1000-miles-on-one-tank-in-a-2011-Sonata
http://www.cleanmpg.com/forums/showthread.php?t=32860

Ban me! I'll just strike up another name

That is also against the forum rules.

14.5 gallons of gas divided by 500 miles doesn't get you 38 miles to the gallon.

You have that backwards. You divide the miles by the gallons, not the gallons by the miles.

also to get the 11.8 gallons used, did you drain the tank?

You don't have to drain the tank. You just fill up the tank. The gas pump will tell you how many gallons you put in. Why is that so hard to comprehend?

 

[Silentwolf]

Been getting an average of 12.2(+/-.5) gallons each fill up. Variability accounting for exactly when i fill it up (which is usually right when the gas light comes on) and been going to the same gas station. Presently averaging 27.3 (+/- .4)mpg on a mixed cycle (~60%city).

 

[BobMs_wht2k2]

Just filled the car. 404.2 miles. Required 11.65 gallons to refill. 34.678mpg. Not bad considering the CEL has been on the last 200 miles for a bad rear O2 sensor/leaky flex pipe. Do I need to take pictures of every receipt I use?

I think someone needs to go to www.ecomodder.com and take a look around. Guys there are 30-40% over EPA estimates. Some are 100% over but they are a bit kooky.

 

[mtlelantra]

http://autos.yahoo.com/carfinder/?sort=msrp&sortdir=asc&num=15&make=Hyundai&expanded=make

Ummmmm are you that ignorant?
1) The fuel economies posted on that page are combined city/highway. EPA for the new Elantra is 26/34.
2) Posted fuel economies are EPA estimates based on it running on a treadmill at a certain load with a certain speed. Real life results vary. I get better fuel economy on the highway at 75 mph than at 65 mph. I think the EPA tests are at 65 for highway. I'll spoon feed ya: http://www.fueleconomy.gov/feg/why_differ.shtml
3) I can get ~29 mpg on 100% city driving (stop sign or stop light every 2-3 blocks for 7 miles twice a day). EPA says I should only get 21 city and 29 highway for the 2004... I *NEVER* get below 30 mpg on the highway... I usually get 34 combined.
4) IB4TMFL
5) QED STFU