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http://biz.yahoo.com/cnnm/070515/050907_gas_myths.html?.v=1&.pf=family-home&printer=1

CNNMoney.com
4 gas-saving myths
Tuesday May 15, 3:34 pm ET

By David Ellis, CNNMoney.com staff writer

Using a special additive or cutting off your A/C won't really cut your gasoline consumption. But myths like these run rampant in the minds of American drivers.
Right now, the price of gasoline is again setting record highs. The average price for a gallon of regular hit $3.087 Tuesday, the third record in a row.

So before you attempt a half-baked scheme to stretch your gas dollars, here's a look at what's fact and what's fiction when it comes to fuel economy:

Nothing but gimmicks

There have been additives, special magnets and even a pill that has promised to improve a car's fuel efficiency by as much as 30 percent in some cases.

While the promise of stretching your gas dollars seems awfully lucrative, especially when they cost under $20, most of these products provide a negligible, if any, improvement in fuel efficiency, said Rik Paul, the automotive editor for the publication Consumer Reports.

Consumer Reports and the government's Environmental Protection Agency, have tested dozens of these products finding that none of them offer any significant improvement in fuel economy.

"With all the pressure car companies are under, if one of these inexpensive devices dramatically did improve fuel economy, they (automakers) would be all over it," said Paul.

Windows, air conditioning - who cares?

There's the old saw that leaving your windows rolled down creates an aerodynamic drag on your car, cutting down on fuel efficiency. And there's the notion that the fastest way to drain your gas tank is by running your air conditioning.

Don't believe either one.

In two separate studies conducted in 2005, the automotive Web site Edmunds.com and Consumer Reports compared the fuel economy of both a sedan and an SUV at highway speeds with and without air conditioning and how open windows affected gas usage.

What they found was no significant difference in fuel economy in either sedan or SUV under either condition.

Don't wait until Wednesday

Some drivers insist the best time to buy gasoline is on a Wednesday, when pump prices have cooled from the weekend run-up when oil companies typically raise prices.

That's true to a point, says Tom Kloza, chief oil analyst at the Oil Price Information Service. Gas prices tend to be higher on the weekend, but there's no ideal day of the week to purchase your gas.

Geoff Sundstrom of the motorist organization AAA notes that gas prices fluctuate from day to day and are determined by gas station owners who look at a variety of factors including wholesale gasoline prices, competitors' prices and food and drink sales if they have an attached convenience store.

Drivers who want to bargain-hunt for inexpensive gas should instead check out Web sites like Gasbuddy.com, which allows consumers to find the cheapest gas in their area simply by entering their zip code.

Restart your engines

It's probably a myth that goes back to the days when cars were equipped with carburetors, but many drivers believe that starting up and turning off your car repeatedly is a fast way to drain your gas tank.

But because of modern fuel-injection technology, drivers actually save gas by turning off their engine than letting their car needlessly idle, says Consumer Reports' Paul.

Granted it's probably not sensible shutting down the engine every time you get stuck in traffic, but if it looks like you might be at the drive-thru for more than 30 seconds to a minute, it's worth turning off your car, says Paul.

Tips you can use

So what are some fuel-savings tips you can trust?

Make sure your tires are properly inflated for starters. Besides posing a safety hazard, underinflated tires can reduce your fuel economy slightly, based on Edmunds.com's 2005 study.

Removing excess weight from your car can also help save you gas. The Department of Energy estimates that drivers can save anywhere between 3 and 6 cents a gallon (assuming gas prices of $2.97 a gallon) just by removing those golf clubs and other unnecessary weight from your trunk.

If your car comes equipped with cruise control, make sure you use it, especially on long trips. Edmunds.com's study revealed that using cruise control at highway speeds offered an average fuel economy savings of 7 percent.

But the biggest fuel saver is driving the speed limit and driving sensibly. Rapid starts and stops and exceeding the speed limit will dent your pocketbook. Just by adhering to one of those, the Department of Energy estimates that drivers can save anywhere between 15 and 98 cents a gallon, again assuming pump prices are at $2.97 a gallon.
 

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Nice find!

Also, the MythBusters have tested several of these things: A/C vs. windows down, gas savers, etc. and busted them every time.
 

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I wouldn't mind shutting my car off instead of idling in traffic jams once in a while...but i'd be nervous of being the idiot who turned his car off, and it wouldn't start again.
 

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The article said that neither having your windows down nor A/C on presents a significant decrease in mileage. I think that's total crap. Now I believe there's no significant difference between the two, but I know that if I take a trip with my windows up and A/C off and compare that to a trip with my A/C on, I can guarantee the difference will be more noticeable than leaving my golf clubs in the garage.
 

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Gti07Md said:
I wouldn't mind shutting my car off instead of idling in traffic jams once in a while...but i'd be nervous of being the idiot who turned his car off, and it wouldn't start again.
you will burn the starter out WAY faster by doing that. i wouldnt not recommend doing that too much.
 

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BlueFrogPosse said:
The article said that neither having your windows down nor A/C on presents a significant decrease in mileage. I think that's total crap. Now I believe there's no significant difference between the two, but I know that if I take a trip with my windows up and A/C off and compare that to a trip with my A/C on, I can guarantee the difference will be more noticeable than leaving my golf clubs in the garage.
I turn my AC on while coasting downhill and fan only uphill.
 

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im not sure if i believe the whole windows down thingy,

im a positive that windows down does affect gas mileage but thats with my own experience. Its not a great hit in mpg, but its a hit.

Also driving during when the weather is around 60degrees improves mpg.
 

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"Driving sensibly" is a big gas saver. I've been driving pretty sensibly for about a week... no hard acceleration, not much fast driving, and I must say... it's a BIG difference for me.
 

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you know driving resopnsabily is one of the best ways to save on gas but also not cruzing around town will help out too like if you live 2 blocks from the store walk and not drive or even take a bicycle. that is one of the best ways too. i have a couple of soldiers that live 3 blocks from our company and they all drive there cars they do NOT even carpool to PT formation in the morning and work call and lunch and than they all bitch cause they are using too much gas. it is auctallY quicker to walk 2-3 blocks sometimes depending on traffic and during 600-630, 730-800, 900-930, 1100-1330 is bad but it is the wrose at 1600-1800. IT TAKES ME 30 MINUTES TO GO 300 feet sometime cause of all the people leaving post.
 

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top of the chain gti said:
you know driving resopnsabily is one of the best ways to save on gas but also not cruzing around town will help out too like if you live 2 blocks from the store walk and not drive or even take a bicycle. that is one of the best ways too. i have a couple of soldiers that live 3 blocks from our company and they all drive there cars they do NOT even carpool to PT formation in the morning and work call and lunch and than they all bitch cause they are using too much gas. it is auctallY quicker to walk 2-3 blocks sometimes depending on traffic and during 600-630, 730-800, 900-930, 1100-1330 is bad but it is the wrose at 1600-1800. IT TAKES ME 30 MINUTES TO GO 300 feet sometime cause of all the people leaving post.
Yeah, but I know for a fact that the guys on my sub who live out in town also have cool cars; they wouldn't be caught dead carpooling. And if the command sponsored it . . . well, let's just say that most of the guys hate the command. It's a culture change that has to start in childhood; it's not something that will just change overnight :(
 

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top of the chain gti said:
you know driving resopnsabily is one of the best ways to save on gas but also not cruzing around town will help out too like if you live 2 blocks from the store walk and not drive or even take a bicycle. that is one of the best ways too. i have a couple of soldiers that live 3 blocks from our company and they all drive there cars they do NOT even carpool to PT formation in the morning and work call and lunch and than they all bitch cause they are using too much gas. it is auctallY quicker to walk 2-3 blocks sometimes depending on traffic and during 600-630, 730-800, 900-930, 1100-1330 is bad but it is the wrose at 1600-1800. IT TAKES ME 30 MINUTES TO GO 300 feet sometime cause of all the people leaving post.
Top-

Well if you are leading PT and they can't walk 2-3 blocks, I'm sure you could find a way to make 'em feel a lil more "special" during PT >:D
 

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i will keep that in mind for monday when i give pt i guess i will just have to make them do grass drills and lots and lots and lots of push ups and sit ups
 

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I find that I get better mileage when I don't have my MPG up in the MFD. Everyday I compare my average MPG on my route to work and I seem to do better when I'm not focusing on trying to be efficient, it seems counter intuitive but maybe i'm being less of a nervous driver
 

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Id rather spend the extra money because my family is getting involved in ethanol biomass, So the higher gas prices get=faster this will happen
 

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Maduga said:
Id rather spend the extra money because my family is getting involved in ethanol biomass, So the higher gas prices get=faster this will happen
Dude- you shouldda bought a Prius ;D
 

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BlueFrogPosse said:
The article said that neither having your windows down nor A/C on presents a significant decrease in mileage. I think that's total crap. Now I believe there's no significant difference between the two, but I know that if I take a trip with my windows up and A/C off and compare that to a trip with my A/C on, I can guarantee the difference will be more noticeable than leaving my golf clubs in the garage.
you need to watch that myth busters, they had two big V8 SUV's and did loads of tests. if anyone watches the show they know how many tests they do. they did another MPG show to test them selfs after getting alot of mail from drivers saying they didnt test it right on the first. the problem with the myth was speed. they found out if you are under 50 MPH windows down is best . and above 50 mph windows up A/C on is the best. this was to test of windows down vs. A/C on windows up. every body already knows windows up A/C off would be best at any speed.
so anyway they found out the drag with the windows down only hurt the MPG above 50 mph.
and once that drag was induced at 50 mph it would save more fuel with the A/C on and the windows up to reduce drag.
 
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