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Job

Member Since 02 Aug 2013
Offline Last Active Dec 15 2014 02:01 PM
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Posts I've Made

In Topic: Ford Fiesta Ecoboost Mpg

10 December 2014 - 01:41 PM

 

 

 
 
Also I'm surprised none has ever mentioned the 76.4MPG out of town figure, where the !Removed! did that come from.  That's impossible.
 
Jonathan

 

 

It is possible during a simulated drive on a rolling road. The mpg figures are useless as an absolute measure, but they are useful when comparing vehicles.


In Topic: Ford Fiesta Ecoboost Mpg

10 December 2014 - 09:06 AM

I'm really warming to my 1.0 94kw EcoBoost.

The consumption for performance is amazing, although, best on the open road, and a bit of getting the hang of driving it the right way.

I still say the manufacturer's claims are outrageous.

How they can be allowed to get away with such !Removed! is astounding.

This applies to many other models, mind.

Yes, but rolling road tests are the only way to objectively test the mpg of one vehicle against another. Unfortunately this removes the biggest factor the affects fuel consumption - drag caused by wind resistance. Because of this it is more a test of ENGINE/TRANSMISSION efficiency rather than overall CAR mpg as different cars have different drag factors. However I do see more and more caveats appearing in manufacturers mpg data now due to complaints probably. All that said if the mpg is just used for comparisons between vehicles it is still useful as it will indicate which vehicle will likely have the best mpg based on actual road use. We know from people posting here that good mpg figures are possible and I am very happy with the dash indicated 45 mpg I have averaged in 21 months of driving my Ecoboost Fiesta.


In Topic: Ford Fiesta Ecoboost Mpg

11 August 2014 - 10:53 AM

That's a pretty impressive amount, probably about the highest I have seen. I just completed a short 2.5hr each way trip through the Benelux countries which included getting lost, some traffic and bad weather conditions. The average was about 45-50MPG, with on the way there being at the higher end of the scale - with little eco driving unless I was on the speed limit and traffic was flowing relatively normally. I get the impression the car may be tuned for UK roads (no surprise as it is the best seller across the channel) as if I sit  on the equivalent of the UK speed limit ( which is lower than the speeds here) then I get very good fuel efficiency but the minute I go up to the Luxembourg or Belgian limits I notice a drop in efficiency. Anyway if I can squeeze 50MPG out of it I'll be pleased but even more would make me happy

Rod, tuning has nothing to do with the effect of speed on mpg. It's a simple case of physics ie the faster you drive the greater the atmospheric drag. The effect is so dramatic that, say you double your speed the drag increases four fold, heavily reducing mpg.


In Topic: Ford Fiesta Ecoboost Mpg

08 January 2014 - 03:55 PM

Forgot to say I also had a 1.1 litre Panda Active that did low 50s mpg (manufacturer figure was about 56 I think) on the identical commute I do in the fiesta, although it was obviously very slow to accelerate (it needed a damn good thrashing but was still economical. I sold that and the D5 diesel volvo to downsize.

 

maybe ecoboost is good for town but crap on longer runs???

 

Remember air resistance is lower in town!


In Topic: Ford Fiesta Ecoboost Mpg

08 January 2014 - 01:48 PM

Cruise control is excellent on m/ways for improving mpg, unless there are lots of hills and traffic. When you use it you realise how much other people slow down and speed up over time for no other reason than they are not a computer but are very bored and not concentrating very hard, which is understandable. What on earth zero air resistance has to do with it is anyone's guess!?!?

 

Yes, but equally I could say what has love got to do with it?