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Old 03-28-2013, 12:27 PM   #81
Roadworthy
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Hehehe not driving your car doesn't raise your mpg as using zero gas and moving zip gives you 0 haha.
Now if your car was was being towed.....

I think this time before I up the tire pressure in both the front and back, I'm going to chalk the tires first. Nothing like ballooing your tires and having rapid tire wear :S You may save mpg but going to pay much much more later for newer tires.
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Old 03-28-2013, 12:29 PM   #82
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Quote:
Originally Posted by dan50 View Post
The Focus' coefficient of drag is around .27 which is really good, and may be class-leading. Wind can make a big difference, but try driving a Taurus into the same stiff wind and see how it compares.
You're off a touch. Per Moray Callum as reported in car and driver the sedan was 0.297 CD not 0.27. The hatchback is slightly higher though unfortunately they don't say exactly how.

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Consider yourself free to ignore the slightly frumpy sedan. “Well, strangely, it’s the sedan that achieves a 0.297 coefficient of drag,” Callum points out, although he counts it as a pyrrhic victory.
http://www.caranddriver.com/reviews/...d-focus-review

The active grille shutter system may lower that by a few clicks, so either to 0.295, or maybe to 0.27 CD with the grille completely closed off.
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Old 03-28-2013, 12:30 PM   #83
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I think because of the displacement of weight is much higher in the front of the car, hence a bit of sag look on the front tires compared to the back when both are at 35 psi. So if you increase the front tire pressure to match the friction profile of the rears, wear may better... or at least more even...
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Old 03-28-2013, 01:59 PM   #84
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Nothing like ballooing your tires and having rapid tire wear :S You may save mpg but going to pay much much more later for newer tires.
Yeah, honestly, I did it mainly to find the psi sweet spot for handling, any mpg gains are just bonus.

As far as ballooning your tires, I doubt 40psi will by much. I have to take a look at mine, but a lot of all-season tires max rating can but up to 40-42psi.

I used to run 42 front and 38 rear on my Jetta without too much added wear. really made it handle balanced. but obviously all tires are different. some are happy at lower pressure (happy as in normal wear) and some at higher.

at any rate I don't intend to keep these factory tires long.
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Old 03-17-2014, 06:21 PM   #85
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I spoke to a retired Ford mechanic who told me his factory training told them to advise owners to never use premium in a Zetec. FWIW
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Old 03-19-2014, 02:17 PM   #86
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I spoke to a retired Ford mechanic who told me his factory training told them to advise owners to never use premium in a Zetec. FWIW
Not buying it ... High compression engines are going to have more power and be more efficient with higher octane gas. I run only premium in my 2013 Ti HB and my lifetime average is 38.5mpg at over 31K miles.

In Fords own literature they indicate more horse power with premium gas in there performance engines. Top gear did a show on this and verified a power increase using premium for some but not all cars.

An engine with 12:1 compression is going to prefer higher octane gas.


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Old 03-19-2014, 04:43 PM   #87
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Thanks for he response; the retired mechanic told me the 2005 engine in my car was a low compression long-stroke engine with 10:1 or less compression ratio - again, FWIW
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Old 03-20-2014, 06:14 AM   #88
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Hey Doc - FWIW your engine is a Duratec, not a Zetec. And since you posted in a section for cars '12 and newer with a different engine design.... Just doesn't apply.

'Fraid the variations can get confusing, for our divisions here (just to keep 'em separate) yours would be considered a "Mk1.5", the first variant on the original.
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Old 03-20-2014, 08:15 PM   #89
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I was getting 8L per 100klm
took the top off the air box
now its 7.9L per 1ooklm
so far so good.
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Old 03-21-2014, 10:41 AM   #90
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Weld doors shut and sand smooth. Remove springs, remove all interior trim, remove spare tire, add lightweight full body skid plate, place pizza pans over wheel spokes, push car through town.

Mileage for days
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