Poll: What's your MPG?
- Thread starter BombayMix
- Start date
[TW]Fox;20673976 said:It's really not. I appreciate that sometimes you have difficulties spotting facts but this isn't one
im not trying to defend him and say its true, But...
1600rpm crusing at 70mph would cause highish load, where as 80mph @ 1900rpm will create less load = better mpg. Maybe?
ie 3rd gear at 30mph vs 4th get at 30mph. 4th will be lower rpms but the throttle will be open more and 3rd gear would have very little load on the engine, hence needing less throttle?
![[TW]Fox](/data/man-of-honor/2009.png){kind=avatar}
I get 150mpg at 50mph. You can't prove otherwise!
It's hardly trolling to question getting nearly 15% better fuel economy at 80mph than at 70mph
A few people in here seem to think it's possible, as do most of the HSV forum owners who ya know, own the car?
And the fact it's 15% is irrelevant as the numbers are skewed because overall the numbers are so low. 15% on 50mpg yeah I'd agree but 15% on 28mpg is hardly questionable.
And the fact it's 15% is irrelevant as the numbers are skewed because overall the numbers are so low. 15% on 50mpg yeah I'd agree but 15% on 28mpg is hardly questionable.
Gosh yes because I bet nobody on an owners forum ever exagerates anything!
You've even had an automotive engineer suprised at your claims for goodness sake.
You don't gain 15% improved fuel economy by increasing your speed to 80mph. It's an old wives tale. The fact you cite the torque output at a certain rpm as proof of why it happens just highlights how you've got no idea.
15% is 15% is 15%, that's the point of percentages, to give comparable figures in situations like these.
And being as it's getting questioned, I would say it is entirely questionable
Er yeah... 
Hardly immature as OMG I GETS 150 EM PE GEEZ AT 50 U CAN'T PROVE OTHERWISE.
Well I appear to be stooping to your level here. I feel it's a case of put up or shut up with you saying MY car won't be more efficient at 80. I'll certainly put up the next time I collect my car.
Hardly immature as OMG I GETS 150 EM PE GEEZ AT 50 U CAN'T PROVE OTHERWISE.Well I appear to be stooping to your level here. I feel it's a case of put up or shut up with you saying MY car won't be more efficient at 80. I'll certainly put up the next time I collect my car.
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Er yeah...
I'd say it's every bit as 'immature' if not more so, given the purpose of my comment was to highlight how flawed your implication that what you said was true because I couldnt prove otherwise, whereas the purpose of your comment was simply to insult me
Yes, of course. That or you could realise that when you make claims which appear to challenge convention, people will question them and you should be prepared to discuss them.
What testing methodology did you employ to verify your claims that your car gains 4mpg by increasing your speed from 70mph to 80mph?
The presence of air resistence means that the faster you travel the more power is required to maintain speed. Travelling at 80mph instead of 70mph requires a suprising amount more power - and generating this power obviously requires fuel. It is of course true that at much lower speeds you may find that 40 is more efficient than say 20 but once you start getting into bigger speeds air resistence is the dominating factor.
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Recently purchased a 2007 Focus Zetec Climate (115bhp version) and from the last 217 miles I've driven I'm getting an average of 33mpg. Is this normal? I drive like an old man so it's certainly not excessive speed / changing gears at high rpm which is having an effect. I've mainly been doing town / A Road driving.
I reset it before I set off to London on a 100 mile trip mainly sitting at around 70 with the odd average speed camera zone and at the end of that journey the average MPG was 49mpg.
So is it just driving around town which has the major effect?
I reset it before I set off to London on a 100 mile trip mainly sitting at around 70 with the odd average speed camera zone and at the end of that journey the average MPG was 49mpg.
So is it just driving around town which has the major effect?
Er yeah...
Well I appear to be stooping to your level here. I feel it's a case of put up or shut up with you saying MY car won't be more efficiant at 80. I'll certainly put up the next time I collect my car.
I don't really see how you intend to prove it anyway?
A tank average is completely pointless unless you do nothing other than an 80mph cruise on the whole tank and then a 70mph cruise on a whole tank, otherwise the figures will just get skewed by all your other driving (like around town), the sort of figures that can vary massively day to day through no control of your own anyway.
My work commute can be anywhere between 25MPG and 35MPG dependant on what traffic lights catch me, which roundabouts are busy etc.
Instantaneous OBC displays are also totally pointless as you can manipulate those into displaying almost anything with the right sort of driving.