‘Miles per gallon’ can misrepresent a car’s fuel efficiency
Thursday, September 25th, 2008 at
5:14 pm
Read more: http://environment.newscientist.com/article/dn14173?DCMP=NLC-youtube
Researchers from Duke University tell us why a car’s mpg rating can be deceiving.
Duration : 0:3:16
Tagged with: auto • car • efficiency • fuel • gallon • Gas • miles • MPG • per • petrol
Filed under: budget living
Like this post? Subscribe to my RSS feed and get loads more!
We use litres per …
We use litres per 100 kilometers in Europe witch is perfectly linear -just another reason why to leave outdated imperial unit system.
By the way, this …
By the way, this kind of confusion is exactly why the US needs to get off its and switch to metric.
Double check your …
Double check your info, marky1333. A pint is 1/8 of a gallon, imperial or not.
LOL. MPG = 1 / GPM. …
LOL. MPG = 1 / GPM. Advice for iynque: don’t do your own taxes.
Did you hate math …
Did you hate math growing up?
It’ll be another 50 …
It’ll be another 50 years because we make the switch to metric. We’re too busy worrying about what our citizens are doing in their bedrooms and about concocted lies like epidemic youth violence.
Yes Cactos, and I …
Yes Cactos, and I didn’t need you to tell me that you didn’t finish high school to know that. You might be smart, but it doesn’t come across when you write like that.
In Norway we use:
…
In Norway we use:
liters/mil = liters/10km
Sorry to be upfront …
Sorry to be upfront etc. but it is presented as litres/100km in Germany( I know ), France(I read in a French car magazine) and probably the rest of Europe. I was dumbfounded the first time I heard the American way to do it.
It is done the way they describe in Europe at least for fifty years!
And you need New Scientists to figure that out? What Europe does (metric, of course) for the last decades?
Dumbfounded again,
Michael
i don’t want to …
i don’t want to fight… lets just make love
I’m sorry dude, but …
I’m sorry dude, but I’m running out of ways to eplain things any clearer.
Saving actual phyical amounts of fuel is what matters.
Saving 33 gallons is better than saving 20 gallons.
Replacing 10mpg cars with 15mpg cars is more of an improvment in fuel use, than replacing 25mpg cars with 50mpg cars.
In an ideal world, we’d replace the lot with 50mpg cars =)
But failing that, replacing the super inneficiant vehicles with midefficiancy, is better than replacing midefficiany with high efficiancy
how do you figure?! …
how do you figure?! the ratio is a direct indicator… ie: 1 mpg vs 2 mpg/ 2 mpg vs 3 mpg
Looking at the …
Looking at the ratio is not an indicator of which will save you the most fuel.
Saving the most fuel is what the video is about
Ok, hear me out. In …
Ok, hear me out. In straight forward blunt math, yes, the difference is obvious, you save more. That is why I said earlier that you have to look at the RATIO. How do you not understand it?! I am baffled by your lack of intellect.
Okay chasinatorv. …
Okay chasinatorv. You’re either a troll or are blinded by your own biases. You have come up with the right answer once your self once
“now genious, I understand that 33.3 is a larger difference than 20″
Yet you refuse to accept that saving a large amount of fuel is better than saving a small amount of fuel
Talking with you is obviously pointless. So consider this discussion at an end. Goodbye
Of course not. and …
Of course not. and if you think it would than you need to take a hammer and hit yourself in the head with it.
Would replacing a …
Would replacing a 10mpg car with a 15mpg car save more fuel than replacing a 25mpg car with a 50mpg car?
and before you jump …
and before you jump all over my spelling error, it is obvious that i meant ignorant.
Now, mr ingorant …
Now, mr ingorant thelleht…. I realize that you are quite unintelligent, so i will break it down for you… when going over a set distance for both sets of vehicles, the difference will be obvious that the lower mpg cars will have a larger difference in gas used, but you have to look at the ratio.. your parents must hate you
yes.. 10 mpg would …
yes.. 10 mpg would take 100 gallons… 15 would take 66.7 gallons, 25 would take 40 gallons, 50 would take 20 gallons….. now genious, I understand that 33.3 is a larger difference than 20, but that is only because you need more gas over all… if you went far enough for the 25 mpg car to expell 100 gallons than the 50 mpg car would use 50 gallons… you are a moron
My previous post …
My previous post should have said “15 mpg” not “15 mps”. My appologies for the typo.
Since I’m such an …
Since I’m such an idiot. Could you please tell me how much fuel it would take to go 1,000 miles if you had an car which did
10mpg
15mps
25mpg
50mpg
Thank you in advance
Wow thelleht…. …
Wow thelleht…. You are retarded…… seriously….. Let me put this into moron easy to understand terms for you… 15 mpg is 1.5 times better than 10 mpg… while 50 mpg is 2 times better than 25 mpg… a ing 5 year old child could tell you that 2 is a larger number than 1.5…. and irregardless of me just winning that argument, its not about how its better to replace a 10 mpg with a 15 mpg than a 25 with a 50 (because its not) its about how even smaller changes can still add up over time
Don’t forget, the …
Don’t forget, the truck can be twice the metals and plastics of the car and has a greater impact on the road surface, etc.. even if the *cost* to the consumer for the better truck were about on a par with the car, it’s better for *everyone* if consumers stopped using 5lb sledgehammers to drive finishing nails and went and got cars for playing taxi for the kids and shopping instead of SUVs.
The real problem is …
The real problem is the flawed anology used in the video. How *much* better usage of gas is a slightly better passanger car compared to a much better truck ? Not very simply because a *truck* is never going to be as efficient as a passenger carrying vehicle as a car designed to *be* a passanger carrying vehicle. What the video was talking about was *relative* improvments and, I am sorry, the car wins even if it got only 2 more miles per gallon than the truck.