Posted on 05/23/2008 11:18:17 AM PDT by newgeezer
Sure you want to save gas, but there's a lot of bad advice on how to do it. Some of it makes no difference, and some of it can wind up costing you.
With gasoline prices hitting record levels, it seems everyone has a tip on how to save fuel. Much of the advice is well-intentioned, but in the end, much of it won't lower your gas bill.
Here's a look at a few misconceptions:
#1. Fill Your Tank in the Morning
You may have heard that it's best to fill your gas tank in the early morning while the fuel is cold. The theory goes that fluids are more dense at lower temperatures, so a gallon of cold gas actually has more gas molecules than a gallon of warmer gas.
But the temperature of the gasoline as it comes out of the nozzle varies little during the course of the day, according to Consumer Reports, so there's little, if any, benefit, to getting up early to pump gas.
#2. Change Your Air Filter
Maintaining your car is important, but a clean air filter isn't going to save you any gas. Modern engines have computer sensors that automatically adjust the fuel-air mixture as an increasingly clogged air filter chokes off the engine's air supply.
While engine power will decrease slightly as the air filter becomes clogged, a lack of performance or an increase in fuel consumption will be negligible, Consumer Reports says.
#3. Use Premium Fuel
With prices already over $4.00 a gallon, premium gasoline is a hard sell these days. But a lot of drivers think because their owners' manual recommends premium, they'll get better fuel economy if they stick with it. Really, they're paying more money for nothing.
Even cars for which premium is recommended won't suffer with regular fuel. Modern engine technology comes to the rescue again. When sensors detect regular instead of premium fuel, the system automatically adjusts spark plug timing. The result is a slight reduction in peak horsepower - really, you'll never notice - but no reduction in fuel economy.
#4. Pump Up Your Tires
Proper tire inflation is important for a number of reasons. Under-inflated tires are bad for handling and can even cause a crash. Improper tire inflation also causes tires to wear out faster and to heat up more, which could trigger a dangerous high-speed blow-out.
According to on-the-road driving tests by both Consumer Reports and auto information site Edmunds.com, underinflated tires reduce fuel economy, so proper inflation is key.
But you should never over-inflate your tires. They'll get you slightly better fuel economy because there will be less tread touching the road, reducing friction. But that means less grip for braking and turning. The added risk of a crash isn't worth the extra mile a gallon you might gain.
#5. To A/C or Not A/C
There's no question air-conditioning makes extra work for the engine, increasing fuel use. But car air conditioners are much more efficient today than they used to be. In around-town driving, using the A/C will drop fuel economy by about a mile a gallon.
Meanwhile, driving at higher speeds with the windows down greatly increases aerodynamic drag. As speed increases, drag becomes more of an issue, making A/C use the more efficient choice at high speeds.
At most speeds and in most vehicles, A/C use drains slightly more fuel than driving with the windows down, contends David Champion, head of auto testing for Consumer Reports. "My final take on is that it's very close," says Phil Reed, consumer advice editor for Edmunds.com. "It's hard to measure the difference and every vehicle is different."
The best choice - if temperature and humidity allow - is to keep the windows rolled up and to turn the A/C compressor off. You can keep the fans running to blow in air from the outside, but your car will be as aerodynamic as possible while still letting you breathe. You will save gas, but the fuel economy improvement will be slight.
#6. Bolt-Ons and Pour-Ins
Before you buy a device that's supposed to make your car more fuel-efficient or pour in an allegedly gas-saving additive, ask yourself this: Don't you think oil and car companies aren't doing everything they can to beat their competitors?
If BP could add something to its gasoline that made cars go farther on a gallon, cars would be lining up at the company's pumps. Sure, people would burn their fuel-saving BP gas more slowly, but then they'd drive right past rivals' gas stations to come back to BP for more. BP stations could even charge more for their gas and still sell tons of the stuff.
So if there really was an additive that made gas burn up more slowly, it wouldn't be sold over the Internet one bottle at a time.
Likewise, car companies are already spending big bucks to increase fuel mileage. If General Motors could make its cars go significantly farther on a gallon simply by putting a device into the fuel line, don't think for a second it wouldn't be doing that. GM's car sales would go through the roof.
"There are a number of these gas-saving devices that are generally useless," says Champion.
But drivers who try them will swear they work. In reality, it's probably an automotive placebo effect, says Reed. Buy one of these devices or additives, and you're like to pay extreme attention to your fuel economy and how you drive.
Of course it can't hurt to keep a close eye on your driving habits -- and what kind of car you drive. In the end, that can make the most difference in saving gas.
Copyrighted, CNNMoney. All Rights Reserved.
http://www.howtoadvice.com/savinggas
Thirty Gas Saving Tips
by Ernest Miles
Arm and Leg Gas Prices
The surest way you can improve your fuel cost problem is to change your motoring habits. Listed below under four categories are 30 effective methods of doing so... no need to buy expensive add-on equipment.
ENGINE WARM-UP
1. Avoid prolonged warming up of engine, even on cold mornings - 30 to 45 seconds is plenty of time.
2. Be sure the automatic choke is disengaged after engine warm up... chokes often get stuck, resulting in bad gas/air mixture.
3. Don’t start and stop engine needlessly. Idling your engine for one minute consumes the gas amount equivalent to when you start the engine.
4. Avoid “reving” the engine, especially just before you switch the engine off; this wastes fuel needlessly and washes oil down from the inside cylinder walls, owing to loss of oil pressure.
5. Eliminate jack-rabbit starts. Accelerate slowly when starting from dead stop. Don’t push pedal down more than 1/4 of the total foot travel. This allows carburetor to function at peak efficiency.
HOW TO BUY GASOLINE
6. Buy gasoline during coolest time of day - early morning or late evening is best. During these times gasoline is densest. Keep in mind - gas pumps measure volumes of gasoline, not densities of fuel concentration. You are charged according to “volume of measurement”.
7. Choose type and brand of gasoline carefully. Certain brands provide you with greater economy because of better quality. Use the brands which “seem” most beneficial.
8. Avoid filling gas tank to top. Overfilling results in sloshing over and out of tank. Never fill gas tank past the first “click” of fuel nozzle, if nozzle is automatic.
HOW TO DRIVE ECONOMICALLY
9. Exceeding 40 mph forces your auto to overcome tremendous wind resistance.
10. Never exceed legal speed limit. Primarily they are set for your traveling safety, however better gas efficiency also occurs. Traveling at 55 mph give you up to 21% better mileage when compared to former legal speed limits of 65 mph and 70 mph.
cover
Buy Now
11. Traveling at fast rates in low gears can consume up to 45% more fuel than is needed.
12. Manual shift driven cars allow you to change to highest gear as soon as possible, thereby letting you save gas if you “nurse it along”. However, if you cause the engine to “bog down”, premature wearing of engine parts occurs.
13. Keep windows closed when traveling at highway speeds. Open windows cause air drag, reducing your mileage by 10%.
14. Drive steadily. Slowing down or speeding up wastes fuel. Also avoid tailgating - the driver in front of you is unpredictable. Not only is it unsafe, but if affects your economy, if he slows down unexpectedly.
15.Think ahead when approaching hills. If you accelerate, do it before you reach the hill, not while you’re on it.
GENERAL ADVICE
16. Do not rest left foot on floor board pedals while driving. The slightest pressure puts “mechanical drag” on components, wearing them down prematurely. This “dragging” also demands additional fuel usage.
17. Avoid rough roads whenever possible, because dirt or gravel rob you of up to 30% of your gas mileage.
18. Use alternate roads when safer, shorter, straighter. Compare traveling distance differences - remember that corners, curves and lane jumping requires extra gas. The shortest distance between two points is always straight.
19. Stoplights are usually timed for your motoring advantage. By traveling steadily at the legal speed limit you boost your chances of having the “green light” all the way.
20. Automatic transmissions should be allowed to cool down when your car is idling at a standstill, e.g. railroad crossings, long traffic lights, etc. Place gear into neutral position. This reduces transmission strain and allows transmission to cool.
21. Park car so that you can later begin to travel in forward gear; avoid reverse gear maneuvers to save gas.
22. Regular tune-ups ensure best economy; check owner’s manual for recommended maintenance intervals. Special attention should be given to maintaining clean air filters... diminished air flow increases gas waste.
23. Inspect suspension and chassis parts for occasional misalignment. Bent wheels, axles, bad shocks, broken springs, etc. create engine drag and are unsafe at high traveling speeds.
24. Remove snow tires during good weather seasons; traveling on deep tire tread really robs fuel!
25. Inflate all tires to maximum limit. Each tire should be periodically spun, balanced and checked for out-of-round. When shopping for new tires, get large diameter tires for rear wheels. Radial designs are the recognized fuel-savers; check manufacturer’s specifications for maximum tire pressures.
26. Remove vinyl tops - they cause air drag. Rough surfaces disturb otherwise smooth air flow around a car’s body. Bear in mind when buying new cars that a fancy sun roof helps disturb smooth air flow (and mileage).
27. Auto air conditioners can reduce fuel economy by 10% to 20%. Heater fan, power windows and seats increase engine load; the more load on your engine, the less miles per gallon.
28. Remove excess weight from trunk or inside of car - extra tires, back seats, unnecessary heavy parts. Extra weight reduces mileage, especially when driving up inclines.
29. Car pools reduce travel monotony and gas expense - all riders chip in to help you buy. Conversation helps to keep the driver alert. Pooling also reduces traffic congestion, gives the driver easier maneuverability and greater “steady speed” economy. For best results, distribute passenger weight evenly throughout car.
30. During cold weather watch for icicles frozen to car frame. Up to 100 lbs. can be quickly accumulated! Unremoved snow and ice cause tremendous wind resistance. Warm water thrown on (or hosed on) will eliminate it fast.
EXTRA TIPS
Install pressure regulator valve (sold in auto parts stores)... Use graphite motor oil... Beware of oil additives, regardless of advertising claims... Add Marvel Mystery Oil into gas fill-ups... Investigate fuel/water injection methods and products... combine short errands into one trip... Use special gas additives to prevent winter freezing of gas lines... convert your V8 engine over to a V4 - no special kits needed!!!
Related Articles
* 45 Professional Tips To Cut Big Gasoline Bills
* Selecting The Right Octane For Your Car
* Gas Pains: An unconventional approach to improving gas mileage
I tend to put the vehicle in neutral or park when I know I’m going to be sitting for a while, given that the car is constantly pulling at the brakes.
With something like a long slow train, I shut off the engine.
Typo?
I wish that were the case, but it sure isn't with either our 6 cylinder Camry or 4 banger Yaris.....the Yaris gets 35/36 around town during the couple of months we don't need A/C....the rest of the year it's 29/30.
Kind of funny to see those two statements juxtaposed...
I actually use MMO on occasion, having gotten started in light aircraft (synthetic oil of wintergreen).
???
But 39 is OK ?
I drive downwind whenever I can...
All those tips and they missed the easiest one.
ALWAYS MAKE SURE TO RELEASE THE EMERGENCY BRAKE.
Or, as some call it “the thing that makes the car smell real funny”.
Is that why my Honda CR500 gets only about 20 MPG?
I wouldn’t beleive ANYTHING that comes from Consumer Reorts, let alone on CNN!
Consumers Reports is just another arm of the Ralph Nader, anti capitalist movement.
Try not come to a complete stop when legally possible (ex. rush hour traffic or approaching red lights)!
Anybody think there's any truth to that? I wondered which is worse on the transmission -- letting the automatic "clutch" keep the trans in "neutral" or manually shifting to netural.
It makes a good hydraulic fluid, in a pinch....
Does a pick-up get better mileage with the tail gate up or down?
Lately, I've read claims that the break-even time is 30 seconds or, most recently, 10 seconds.
6. Buy gasoline during coolest time of day
Precisely the alleged myth debunked by Consumer Reports in the article above.
7. Choose type and brand of gasoline carefully.
Bah. See the article above. If BP/etc. could back up that claim, they'd shout it from the rooftops.
10. ... Traveling at 55 mph give you up to 21% better mileage when compared to former legal speed limits of 65 mph and 70 mph.
"Former"? This and its earlier note about the "automatic choke" tell me these tips must be 30 years old. Next, I expect it will say Ethyl is better than kerosene. ;^)
That happened to me once.........
Yeah ...
This sage advice reminds me of the old joke about the Texas Aggie who parked
a new panel wagon in the driveway, peeled off the siding with a crowbar, and
then called his wife out to admire the handiwork.
After a few seconds of silent observation, the Aggie turned to his spouse and
said, "Ya know, Ma. I think I liked it better when it was still in the crate."
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