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Old 11-13-2003, 10:22 AM   #1
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Unhappy Gas Mileage Drop

Hi I've noticed recently (Last 3 fills) that I'm getting approx 100 km's less than usual. There has been no change in my driving.

The weather has gotten colder and I'm using the heater, but 100k difference??

Any Ideas, Think I'm gonna change the plugs and wires this weekend.

Also, I've been noticing more exhaust (If that makes sense) than before

Thanks


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Old 11-13-2003, 10:56 AM   #2
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Is this your first year with the ZX3 in the cold? I have a 2000 SE Zetec just bought 2 months ago, and it's just getting cold here too, and I notice the Cold Idle function stays on a lot longer than it did with warm weather. Aside from a little bit of city driving at both ends of my 45 km (one way) daily commute, my driving is mostly 4 lane highway at 110 - 120 km /h, so overall, I don't think the cold is giving me worse fuel economy- once I hit the highway things warm up pretty quick. However, if your situation has a lot of city driving, the cold start mode would have a longer overall effect -ie a much greater percentage of your total fuel consumed would be in cold start mode.

With my car, I get 8.2 litres / 100 km (about 31 U.S. MPG), which isn't exactly astounding fuel economy anyway. That translates to about 560 km for a tank full.

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Old 11-13-2003, 11:00 AM   #3
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R U using any gas additives ?

I've used some of those octane booster additives and my MPG went down the toilet.
My MPG was 29-30MPG.
I stopped using them and now I average about 34MPG.
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Old 11-13-2003, 11:11 AM   #4
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Does Canada use oxinated fuels all year round, part time, or never? Here, when they switch to winter fuels, our fuel economy usually drops a little.

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The gasoline pumps at my Chevron station say that the gasoline is oxygenated during the winter to reduce carbon monoxide emissions. What does "oxygenated" mean and why is this required?

"Oxygenated gasoline" is a mixture of conventional gasoline and one or more combustible liquids which contain oxygen ("oxygenates"). At present, the most common oxygenates are ethanol and MTBE (Methyl Tertiary Butyl Ether). The government requires gasoline to be oxygenated during the winter in areas that have a carbon monoxide pollution problem (cold weather and atmospheric inversions worsen carbon monoxide pollution). Oxygenated gasoline helps engines run leaner, which helps engines, particularly older engines, produce less carbon monoxide.

Will using oxygenated gasoline hurt my gas mileage?

Only a little. Oxygenated gasoline reduces fuel economy an average of 2%-3% because oxygenates contain less energy than non-oxygenated gasoline. Many other factors, like how well your car is maintained, how you drive (do you have a heavy foot on the accelerator?), traffic congestion, rain and snow, cold weather, and tire pressure can combine to impact mileage far more than oxygenated gasoline.
From: http://www.chevron.com/prodserv/fuel...a/oxygen.shtml
I think they are a little light on their fuel economy estimates.

Last edited by Egz; 11-13-2003 at 11:15 AM.
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Old 11-13-2003, 11:17 AM   #5
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I don't know what would cause your mileage drop besides the cold weather, I notice a slight drop, but nothing drastic, keep tabs on it and watch what happens.
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Old 11-13-2003, 11:35 AM   #6
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R U using any gas additives ?

Yeah I used one bottle of STP Fuel Ingection Cleaner 2 tanks ago

This is my first winter with the focus. I was getting about 400km's to a tank, now it's down to 300.
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Old 11-13-2003, 09:20 PM   #7
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Ok, I think I have the worst gas milage ever!!!! I'm not sure what the Km/litre is supposed to be on my car. I'm just above a half a tank and I've only driven 94km. I'm not sure whats the problem. I know I do have the CAI, and pullies, and exhaust but I don't think it could be that bad. Tomorrow I'm going to do a full system check. I know that my car runs rich does anyone know how to adjust the air/fuel ratio??
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Old 11-13-2003, 09:52 PM   #8
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I only get 260 miles to the tank, terrible gas mileage, i drive my honda, 400miles to the tank and the same capicity = )
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Old 11-15-2003, 12:21 AM   #9
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34? wow!

34 mpg - average - would be amazing.

i haven't seen better than 32, and that was when i was driving cross-country (read: all highway, almost no local miles).

i average in mixed driving at around 26 mpg.

i run 5w30 in my car, this might make a slight difference, but it shouldn't be _that_ significant.

i just assumed that everybody got crappy mileage and ford's marketing lied.
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Old 11-15-2003, 01:56 AM   #10
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Will using oxygenated gasoline hurt my gas mileage?

Only a little. Oxygenated gasoline reduces fuel economy an average of 2%-3% because oxygenates contain less energy than non-oxygenated gasoline. Many other factors, like how well your car is maintained, how you drive (do you have a heavy foot on the accelerator?), traffic congestion, rain and snow, cold weather, and tire pressure can combine to impact mileage far more than oxygenated gasoline.

this is a big lie. Your milage will drop alot more than they claim when you use that crappy gas. They tell you this because they want you to keep buying there gas. Even oregon state realized it is a farce and don't require oxigenated gas anymore. If you burn more fuel, your putting out more pollutio in some ways, even with the cleaner burning ethonol.

i just assumed that everybody got crappy mileage and ford's marketing lied.


Ford marketing doesn't put the milage ratings on the cars. The EPA does. I have gotten 35 mpg with mine, and constantly get 30 mpg in mixed driving. I have never gotten less than 27.5 mpg . I don't baby the thing, but I don't redline it either. Driving style, and auto trannies make more difference than anything else
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