Soldato
[TW]Fox;18242920 said:
That all depends what your driving conditions and style is e.g. M-Way V stop-start town driving....
As I say, some people care... You might not but you are not everyone...
Fuel up/down again
- Thread starter [TW]Fox
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That all depends what your driving conditions and style is e.g. M-Way V stop-start town driving....
As I say, some people care... You might not but you are not everyone...
I don't think any style of driving is going to lead to a 2 or 3 MPG increase in economy just from carrying 25KG less fuel.
Soldato
Well, until someone tries it for a 1-2 week period, I guess we will never know exactly how much.
The US Environmental Protection Agency disagree - http://www.fueleconomy.gov/feg/driveHabits.shtml
As does The AA - http://www.theaa.com/motoring_advice/fuels-and-environment/drive-smart.html
As well as a few other places....
But hey-ho....
![[TW]Fox](/data/man-of-honor/2009.png){kind=avatar}
Hey ho indeed, neither of those places recommends or suggests not having a full tank of fuel.
Infact the US EPA site actualy proves you wrong and Kenai right. It claims reducing weight by 100lb can improve economy by up to 2%. 25kg is about half this, therefore reducing weight by 25kg might improve economy by 1%.
At 30mpg, this is a whole 0.3mpg.
BUT HEY HO.
Soldato
Don't understand the attitude at the end of your post in capital letters.... I stated a fact, you decided to mock it, I defended it and you get tetchy ? 
If someone disagreed with a point you were making, you jump straight in defending it pretty vigorously yet no one can defend a point that you disagree with (even when they are technically correct) ??
If someone disagreed with a point you were making, you jump straight in defending it pretty vigorously yet no one can defend a point that you disagree with (even when they are technically correct) ??
I'm sorry but you'll have to point out the bits there that disagree with what i'm saying and say that merely underfilling your tank can yield 3MPG of extra economy.
I can't see anything of that nature.
Soldato
[TW]Fox;18243656 said:
I fail to see where I am proved wrong on this site....
No idea why people are stating this 2-3mpg difference.... At no point did I say you would yield huge results, I just said carrying extra weight reduces your economy, I never stated what the results would be
The idea that loading a modern car, especially an even remotely large or powerful one, with 25 Kg extra is going to affect economy by 2 or 3 MPG is ridiculous!
It would take the most absurdly ineffecient circumstances, such as constantly accelerating the car from 10 to 30 MPH, to register even a smidgen of difference. Unless you spend your entire life doing that and drive a 500 Kg car I wouldn't give the weight of fuel in your tank a second's thought.
It would take the most absurdly ineffecient circumstances, such as constantly accelerating the car from 10 to 30 MPH, to register even a smidgen of difference. Unless you spend your entire life doing that and drive a 500 Kg car I wouldn't give the weight of fuel in your tank a second's thought.
Well, you commented on Fox's "couple of MPG" by saying "that depends on your driving style". Speaking practically, it really doesn't.I fail to see where I am proved wrong on this site....
No idea why people are stating this 2-3mpg difference.... At no point did I say you would yield huge results, I just said carrying extra weight reduces your economy, I never stated what the results would be
Soldato
Again, I fail to see where I stated this mystery 2-3mpg figure
Perhaps people should read my post before attacking it....
You quite clearly stated that a "couple of mpg" "depends what your driving conditions and style" is:
People here are saying that the conditions where you would see a 2 MPG increase are either non existent or so improbable to be devoid of worth in a discussion about fuel economy.
I fail to see where I am proved wrong on this site....
No idea why people are stating this 2-3mpg difference.... At no point did I say you would yield huge results, I just said carrying extra weight reduces your economy, I never stated what the results would be
Fox mentioned that half filling a tank won't make enough difference to care about
You responded: "Given some people are raving about their economy going up by a few MPG's on here, it would appear some might. "
Fox countered this by saying that half filling a tank won't give you a few more MPG.
You said it depended on driving style whether it would.
We disgreed and said you're not getting 2 or 3 MPG purely from half filling a tank regardless of driving style and then you've attempted to use those links to say we're wrong despite the fact they vindicate exactly what we're saying.
Soldato
Well, if that's how we are going, you also state -
So you hint that it's possible, and that's (according to you) with a 500kg car which is pretty light
I was exaggerating to make a point, and I probably didn't go far enough to be accurate.So you hint that it's possible, and that's (according to you) with a 500kg car which is pretty light
Theoretically a lot of things are possible, but it's not really worth raising them for serious debate if the percentage of all circumstances for which they are relevant is infinitesimally small - nobody constantly accelerates from 10 to 30 MPH. Nobody.
So you hint that it's possible, and that's (according to you) with a 500kg car which is pretty light
A light car would make any effect larger, as the extra weight is proportionally much larger compared to the car (it would be 5% extra weight, rather than 1.5 - 2% in a regular sized car). Even so, it wouldn't make 'a few MPG' difference.
Soldato
This is what I said...
But then you tried to disagree when someone told you it doesn't make a difference worth caring about and certainly doesn't make a 'few MPG' difference as you later claimed.
You then posted two links which proved you wrong, as Fox showed, they suggest that such action would yield something like 0.3MPG on a 30MPG car. In no way can you constitute 0.3 as 'a few'
You then posted two links which proved you wrong, as Fox showed, they suggest that such action would yield something like 0.3MPG on a 30MPG car. In no way can you constitute 0.3 as 'a few'
Soldato
Seriously?... "Serious Debate" in a forum that the only difference between here and GD is that its content is biased towards motors ??
Soldato
It is something that can be easily altered but yep I agree, insignificant
A person weighs say 60 to 80kg. Difference between people in a car or not would start to alter economy I think.
Even then we're talking into hundreds of kilos, its still about the spirit in which you drive. So its about maintaining momentum or inertia mostly I think.
Also the cycle on the engine, dont suddenly stress it or that is wasteful. Gain before a hill, otherwise you have to change down a gear, etc
This explains why diesels do better with greater torque they are more able at all engine speeds, no thought required
There are some very indepth studies of this kind of thing. Ive heard of people going OTT on Prius mods and stuff to get it to 80mpg all the time, those guys would know what helps or not. Not sure on a forum address
I always imagined my car accelerated a tiny bit faster when close to empty
A person weighs say 60 to 80kg. Difference between people in a car or not would start to alter economy I think.
Even then we're talking into hundreds of kilos, its still about the spirit in which you drive. So its about maintaining momentum or inertia mostly I think.
Also the cycle on the engine, dont suddenly stress it or that is wasteful. Gain before a hill, otherwise you have to change down a gear, etc
This explains why diesels do better with greater torque they are more able at all engine speeds, no thought required
There are some very indepth studies of this kind of thing. Ive heard of people going OTT on Prius mods and stuff to get it to 80mpg all the time, those guys would know what helps or not. Not sure on a forum address
I always imagined my car accelerated a tiny bit faster when close to empty
Soldato
No I didn't. I did not disagree that it makes a small difference and I did not claim that it made a "few mpg" difference regardless of what you say
No I didnt. I posted 2 links that supported my post about extra weight (through fuel) affecting fuel economy.
Be good to see how this develops overnight
, up early tomorrow so off in 5It's probably not going to develop at all as you're the only one forwarding the idea that a 25 Kg difference in vehicle weight could, for some people, yield a "couple of MPG" increase in economy
Not a "few", no, but still a "couple"!