Last post on Apr 25, 2013 at 9:52 AM
You are in the Ford Fiesta
What is this discussion about?
Ford Fiesta, Fuel Efficiency (MPG), Hatchback
#119 of 134 Re: MPG accuracy [phill1]
Jan 22, 2013 (12:18 pm)
Seriously, was this Post for real? More likely a "thesis" for a PHD Degree. Worrying about the longevity of a dual clutch automatic transmission and possible fluid changes up to 150000 miles? Are you considering the purchase for Police or Taxi use? LOL
Pardon me then... I will never take you seriously or make a helpful reply to another of your repetitive posts again. You have always indicated a passion for details, repetitive repetitive details...yet when someone comes along with a few bits of info that a person could use to good advantage, you get on their case???????
Some people would prefer to insult than learn. You decidedly fall into the former category. No wonder you rub others the wrong way from time to time. I've read a LOT lately. This seems to be your curmudgeonly way.
Jan 22, 2013 (6:44 pm)
Let's get back to the cars and stop making each other the discussion OK?
Thanks for your cooperation and participation!
#121 of 134 Re: MPG accuracy [gimmestdtranny]
Jan 24, 2013 (7:55 pm)
I've heard multiple mentions of the fuel pump longevity vs. fuel level issue in the past, and I'm wondering why that would be the case. Why would manufacturers even put the fuel pump in there in such a way to allow normal fluctuations of the fuel levels to cause damage to the pump?
That doesn't make any sense at all.
Jan 24, 2013 (8:14 pm)
So you have never known a manufacturer to design something to fail.... nicely out of warranty?
I presume that the expectation is that most owners will refuel before pump temps get excessive enough that it will fail within warranty periods.
Even low fuel lights are conservatively triggered to come on with tons of warning. Many cars can go well over 60 miles or more before running out. So with 2 or 3 gallons still sloshing around is probably still a reasonable heat sink.
Excessive heat is the enemy in so many aspects of different components, whether they be electronics, metallurgy, tires, oil, batteries and everything in between. Many items are designed with a duty cycle..( a simple transformer based soldering gun for example, or an inexpensive oil less air compressor) and rely on cooling periods between use in order to not self-destruct.
#123 of 134 Re: MPG accuracy [gimmestdtranny]
Jan 25, 2013 (7:12 am)
So sorry, and I certainly apologize for upsetting you with my sarcastic remark. Perhaps readers appreciate elaborate scientific data in regards to everyday driving conditions. I will remain mute and add no further comment to this thread as I promised I would do the same after being expelled from the Kia Rio5 one as well for hurting another Posters feelings. Cheers
#124 of 134 Re: MPG accuracy [gimmestdtranny]
Jan 25, 2013 (7:47 pm)
Quite true. I rarely fill my vehicles up before a quarter tank, and I've run them up to 220,000 miles without fuel pump issues, so I very much doubt that this would ever be a problem unless someone routinely ran their tanks dry.
I had a fuel pump fail on one vehicle at about 215,000 miles, but someone else owned it for the first 170,000, so I can't reasonably attribute that failure to anything other than statistical chance.
That aside, I'm quite happy with the FE on my '11 Fiesta 5-speed. Even at -30F or colder on a full tank driving around town, I still haven't dipped lower than upper 20s. I'm expecting my average after a year to be somewhere close to 35 mpg, but I still have seven months to go before I hit a year.....
Jan 25, 2013 (7:59 pm)
It seems that the Fiesta really does deliver good fuel economy be it with the stick or DCT. Ford seems to have gotten all the criteria to ensure the claims (exceeding actually in most cases from what I've read) just right, be it through gearing, weight, aerodynamics etc.
#126 of 134 Re: MPG accuracy [gimmestdtranny]
Jan 26, 2013 (12:00 am)
That surely seems to be the case. I've been pleased with every aspect of it save for the lack of ability to turn the traction control off (I'll remedy that this summer) and the squeaky brakes.
#127 of 134 Big Hwy & City MPG Difference
Apr 04, 2013 (7:55 am)
I just traded in my 2012 Fiesta SE hatchback (automatic) with 27,000 miles on it. 24,000 miles were 5% city, 45% highway, and 50% stuck in HEAVY DC beltway traffic. Over that time I averaged around 34 mpg while not trying, but I could get over 40 if I really tried on a lighter traffic day. I think my record was a 43 mile trip to work getting 46mpg - I had around 300 miles on the car at that point, and I love to use the A/C.
The last 3,000 miles were mostly puttering (slightly aggressively) around town, and I averaged 27-30 mpg.
That said, all of this was based off the computer readings, which I routinely found to be optimistic by 1 to 2 mpg.
Now I'm driving a 2.0L 2013 Escape AWD averaging 19 mpg - nicer to drive all around, but I'll miss the gas mileage! As for the dual clutch transmission in the Fiesta, I hated it. You explain the theory of relativity to a 2nd grader in the time it took between putting your foot down and the car actually accelerating.
#128 of 134 Re: Big Hwy & City MPG Difference [navy92960]
Apr 04, 2013 (9:03 am)
I can't disagree on the dual clutch automatic - I really didn't care for it, either. Good FE, though! Better than I tend to get out of my manual.
As for the FE computer, it is absolutely spot-on. There's a fair bit of variation from tank to tank looking at calculated vs. computer, but that has to do with variability in the filling process. I record every fill and the "MPG" readout at every fill, and when averaged (even on just a monthly basis), both are within two hundredths the same.