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Old 04-03-2007, 07:56 PM   #1
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What are you doing to increase MPG?

What are Focus drivers doing to increase fuel economy? I would like to hear from some people who are getting GREAT fuel economy in their cars--at least better than the window sticker rating.

I have gotten over 37 MPG out of a tank two times now. I am starting to think that 40 MPG is achievable!

I have a 2006 ZX3, 2.0 liter, manual transmisison. The only relevant mod that I have is an upgrade to the 2007 PCM calibration. I already did the obvious stuff: check the tire pressure, empty the trunk, drive with speed control, turn off AC. What next? What worked for you?

(PS: If you are getting crummy fuel economy, please don't use this thread to tell us about it!)


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Old 04-04-2007, 12:43 AM   #2
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The best way to increase fuel economy is simply to drive slower.

My first car was a perfect example of this. I once drove 700km non-stop on ~$35 worth of gas @ ~55mph. If I had burned up all the gas that the tank could hold (which I didn't, there was some left before I filled up) it worked out to like 44mpg, and this was driving through the Rocky Mountains. I probably could have hit 50mpg if it was a flat stretch of road.

On the way home from that trip, I was tired and impatient and tried to get home faster by doing ~70-75mph. Well, instead of getting 44mpg, I got about 20mpg and had to stop 3 times to fuel up. It ended up costing me three times as much, and it still took longer.

It was a little exaggerated in that car because it had so little HP, but the same holds true for every vehicle.
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Old 04-04-2007, 12:47 AM   #3
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easy on acceleration and brake smoothly...respect the speed limit.
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Old 04-04-2007, 01:01 AM   #4
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On the way home from that trip, I was tired and impatient and tried to get home faster by doing ~70-75mph. Well, instead of getting 44mpg, I got about 20mpg and had to stop 3 times to fuel up.
I think there was something else going on there aside from speed...I routinely go 10 over the limit, and as a result I spend 80% of my time cruising on the highway at ~75 MPH, and I routinely get about 30 MPG (slightly less with winter fuel.)
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Old 04-04-2007, 08:00 AM   #5
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Driving 4 cylinder cars and avoiding rapid starts, timing lights to avoid stopping, adequate air pressure-- riding the bike when I can.
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Old 04-04-2007, 08:08 AM   #6
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Don't get boost LOL

I agree with everyone that said anything with driving. Before my PW went boosted having a full exhuast and intake did show 40+ MPG on a few long road trips.
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Old 04-13-2007, 11:07 PM   #7
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I think there truly is a highway speed range which provides the most efficiency. Now the question is realizing what that is without driving 30 mph on the highway.
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Old 04-14-2007, 10:28 AM   #8
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I think most cars peak on the MPG curve around 45-60
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Old 04-14-2007, 10:37 AM   #9
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I'm averaging minimally 28 mpg this fill up, 210 miles on a shade over half a tank and it has been a mixture of highway/city. I have my tires overinflated. I think I have 37 lbs in back, and 35 lbs in front yesterday when I checked. The door only suggest 32 all around. You do see better gas mileage from properly inflated tires. It is weird, but I get better gas mileage filling up on mobile gas then anybody else for some weird reason. I still haven't figured that one out yet. And it helps that the weather is warmer now. I was only averaging 20 -22 when it was only a high in the teens for basically over a month. I have the 2.3 liter though.
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Old 04-14-2007, 02:22 PM   #10
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Duffman, I think your mpg figures are off because your tires are too large. You're actually going a little further than your odometer is reading which is why it doesn't seem to make a difference to have the tires inflated higher. Personally, I don't inflate my tires above what's recommended unless I'm carrying a load- which is common in the wagon.

A friend is helping me to upgrade the 05 PCM to 07 specs after I do some data-logging. The best I've ever gotten was a trip through the mountains where I got 36mpg. Average is 30 mpg- I drive sometimes fast, sometimes slow depending on my mood and road conditions.

I hope to see higher mileage after the upgrade. I'll also get back into some of my experiments with exotic additives once I get the new tune. These seem to work better on Zetecs than on Duratecs possibly due to the higher compression/ efficiency of the Duratec.

Different brands of fuel will give you some mileage benefits, but this is something that has to be tested in your area because of altitude differences, and other things. Also, fuel stations with old tanks are more likely to give you bad fuel problems- so just note what your mileage is at different places in your area, and remember 2-3 mpg is more economical than 10¢ per gallon. Do the math

It's all pennies, but people make me laugh when they drive across the street for a whopping 20¢ savings on a fill up, but lose 2 mpg due to lesser quality fuel.
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