Sensible AAA recomments not trying "dangerous fuel-saving techniques"
Filed under: MPG, Green Daily
When drivers set out to hypermile, there is a spectrum of techniques that they can use. These range from the good - don't blast away from a red light and don't speed up then slam on the brakes at the next red - to the risky. Dale Earnhardt, Jr. may be able to use hypermiling tricks like shutting down the engine at high speeds to win a race, but that doesn't mean you should try it during your commute. The AAA thinks we need a reminder to not risk our lives - or endanger others - in order to save a little bit of gasoline. Drafting, coasting and "rolling through stop signs and driving at erratic and unsafe speeds" are specifically mentioned in the group's official statement on dangerous hypermiling (read it after the jump).
Who's performing these techniques? It's hard to say, but we can assume that the AAA knows a thing or two that we don't. After all, they're out there rescuing the increasing number of people who are running out of gas these days.
[Source: AAA]
PRESS RELEASE
AAA Advises Hypermilers to Avoid Dangerous Fuel-Saving Techniques
Keep safety first by avoiding techniques that endanger motorists and harm vehicles
ORLANDO, Fla., June 27 /PRNewswire-USNewswire/ -- As record-high fuel prices continue to stress household budgets, many motorists are looking for ways to improve their vehicle's fuel economy -- sometimes to the point of putting their lives in danger. AAA advises motorists to think of safety first, refraining from fuel-saving techniques that could put themselves and others in danger and avoid practices that could harm their vehicles.
Some motorists have gone to extreme measures to conserve fuel while driving by 'hypermiling' -- trying to exceed the EPA estimated fuel efficiency of a vehicle by drastically modifying driving and maintenance habits.
"The goals of hypermiling are positive, such as eliminating aggressive driving and saving energy," said Marshall L. Doney, AAA Automotive vice president. "Unfortunately some motorists have taken their desire to improve fuel economy to extremes with techniques that put themselves, as well as their fellow motorists, in danger."
Examples of the dangerous hypermiling techniques include cutting off the vehicle's engine or putting it in neutral to coast on a roadway, tailgating or drafting larger vehicles, rolling through stop signs and driving at erratic and unsafe speeds. "These practices can put motorists in a treacherous situation where they could lose power steering and brakes or be unable to react to quickly changing traffic conditions," Doney said.
"Not only are these extreme driving behaviors dangerous, many of them also are illegal. However, there are several safe and legal driving techniques motorists can implement to conserve fuel, such as smooth and easy acceleration and braking, maintaining a steady speed, using cruise control and looking ahead to anticipate changing traffic conditions," he said.
Hypermiling techniques are not limited to driving style. How motorists maintain their vehicles is also key in reaching optimal fuel economy, but extreme measures can be harmful to a vehicle.
Keeping tires properly inflated can improve fuel economy by two to three percent, according to the U.S. Department of Energy. However, some drivers have taken this advice too far by over-inflating their tires, which the Rubber Manufacturers Association reports can make them more susceptible to road hazard damage and result in premature wear to the center portion of the tread. Over-inflation can also cause handling issues due to less tire surface making contact with the road.
Using the recommended grade of motor oil is also helpful in improving fuel economy. However, some hypermilers opt to use the lowest 'weight' motor oil (or that with the lowest kinematic viscosity) on the market. However, motor oil is not a fluid that can be freely interchanged and using too light of oil can cause major damage to a vehicle's engine.
In both instances, AAA's auto maintenance experts recommend motorists check their owner's manual for the manufacturer's recommendations. Tires should only be inflated to the pressures specified by the vehicle manufacturer -- and not what is listed on the sidewall of the tire. Motorists also should use the lowest grade motor oil recommended by the manufacturer for their climate.
For assistance with vehicle maintenance, AAA offers a listing of Approved Auto Repair facilities it has certified for meeting and maintaining high professional standards. To locate AAA Approved Auto Repair facilities nearby, visit the Automotive page on AAA.com.
As North America's largest motoring and leisure travel organization, AAA provides more than 51 million members with travel, insurance, financial and automotive-related services. Since its founding in 1902, the not-for-profit, fully tax-paying AAA has been a leader and advocate for the safety and security of all travelers. AAA clubs can be visited on the Internet at www.AAA.com.













Reader Comments (Page 1 of 1)
7-03-2008 @ 11:49AM
BlackbirdHighway said...
Has anyone heard of the Better World Club?
Apparently the AAA lobbies against lots of stuff that "greenies" care about, like CAFE standards, public transportation, and alternative energy.
The Better World Club is supposed to be a greener alternative, and they can provide bicycle roadside assistance as well.
I going to give them a try, and was wondering if anyone else has any experience with them..
http://www.betterworldclub.com/
More on the subject, I basically agree, some hypermiling techniques can be dangerous.
Reply
7-03-2008 @ 12:12PM
david burgdorff said...
Why is coasting unsafe? If I see a red light ahead with a number of cars already stopped should I continue to feed gas to the car? What's wrong with putting the car in neutral? When I drive my manual transmission car I routinely put in the clutch to coast. Why is it unsafe to put my automatic car in neutral to keep the engine from slowing the car?
Reply
7-03-2008 @ 12:30PM
BlackCanary said...
Nothing wrong with that but some people shut the engine off and coast. I hope you only coast by not using the gas, that is fine and everyone should do that. Shutting the car down and coasting is very dangerous - the power steering, abs and other saferty features stop functioning.
Drafting or TAILGATING is also very dangerous and a stupid way to save on fuel. It works for sure but please is it worth death of you and others?
Mythbusters did a real test by drafting a 18 wheeler in a Dodge Magnum. They drafted at various distance and computer the MPG. The did better the closer they got until they got right up to the bumper of the rig, at that point they had to feather the gas and brake so much to maintain distance that they compromised the MPG. Anyway interesting to watch but it is very very dangerous and stupid.
Reply
7-03-2008 @ 12:34PM
HalJordan said...
Putting an automatic car in neutral (while at a stop) does absolutly nothing tangable to save on fuel. It is a complete waste of time.
Reply
7-03-2008 @ 8:25PM
armmat said...
Mr. Hal Jordan....
That's absolute rubbish...when I DON'T coast or put my car in neutral, I get roughly about 280 miles per tank.
When I DO coast and put the car in neutral...including at traffic lights, I get 320 miles per tank.
So..basically..you are WRONG.
7-03-2008 @ 1:36PM
MarkR said...
There's nothing wrong with coasting if you are strong enough to steer a power steering car without the engine assisting. If I see my next light turn red 1/4 - 1/2 a mile away I'll turn the engine off and coast to the light. I've also started turning off the engine when I know the light will take 45 sec. to a min or more to cycle back to green.
My only concern is the savings will go out the window if my starter goes out much sooner than typical.
I have not noticed a sizable increase in mpg, but it does make me feel better.
The best savings I have is the fact I ride my bike to work 3-4 days a week. It saves me approximately a gallon of gas a day.
Reply
7-03-2008 @ 2:42PM
brn said...
Turning your engine off when sitting at a stop is probably ok, as long as you pay attention to the lights so you don't screw up traffic. Of course, there are starter issues (and oil issues).
Turning the engine off while coasting, I'm not convinced is a a good idea. You lose safety equipment and you have a significant delay in getting power back when you need it.
Hypermilers will argue that they are safer than many others on the road. That may or may not be true, as hypermilers are overly aware, hyper, individuals to begin with. Your typical driver will never be as attentive as a true hypermiler. As such, they will be a danger on the road when practicing hypermiling techniques.
I'm a believer in moderation. Stop tailgating so you don't have to brake as much. Look ahead so you know what's coming long before it happens. Slow down a little. Accelerate gently. All this will save you gas and make you safer.
Reply
7-03-2008 @ 3:36PM
KeepIt Running said...
"I have not noticed a sizable increase in mpg, but it does make me feel better."
Well as long as you feel better, Princess, that is what is important.
Try no increase in MPG. Turning your engine off is so stupid. It is not even that efficiant when it is engineered into a car. I dont think you are as vigilant as a mild hybrid system and those only gain 1-2 mpg while subtracting weight from the car.
Dont be an imbecile. Modulate your use of the gas and speed but dont be a complete tool and do crazy things to save a negligable abount of fuel that you wont even notice at the pump. Damage your car to save a 100 bucks a year and that is being very generous. Good job! Trip over dimes to save a penny!
Reply
7-03-2008 @ 3:48PM
WalkaWalka said...
How much fuel can you possibly save by shutting of your car? That is about the dumbest idea yet.
Hey, have heard about the device that will make your car run on your own piss! It is awsome the oil companies dont want you to know about it. Just send me $100 and Ill send you the plans to build the device. The only draw back is you have to eat lots of asparages, smelly piss works better.
I am surrounded by idiots! - Lord Space Ball
Reply
8-27-2008 @ 9:36AM
Jaime said...
Actually, shutting off your car might not save a lot of fuel, but this is AutoblogGreen we're on here -- it's about more than fuel. Turning off your engine if you are idling for more than 30-40 seconds saves a lot of CO2 from getting into the air, and makes intersections a lot more friendly to pedestrians and bikers who have to cross it and breathe in all those exhaust fumes. Dig? And the 'fact' that I keep hearing about fuel savings with stoplights is that with a 6-cylinder engine, it actually does use (even if only marginally) more fuel idling for 30 seconds than it does to turn it off and start up fresh. So, do what you want, but remember, it's not just about the gas savings; it's about the emissions, too.
Cheers.
7-03-2008 @ 9:37PM
philmcneal said...
lol the typical stereotype comments that come from people THAT HAS NO OR ZERO EXPERIENCE IN HYPERMILING
those who do have seen the light
good day!
rofl.... some things never change then again enjoy being oil companies tools fools.
quote
Mythbusters did a real test by drafting a 18 wheeler in a Dodge Magnum. They drafted at various distance and computer the MPG. The did better the closer they got until they got right up to the bumper of the rig, at that point they had to feather the gas and brake so much to maintain distance that they compromised the MPG. Anyway interesting to watch but it is very very dangerous and stupid.
quote
lol mythbusters are the noobs when it comes to fuel economy, let me show you how its done (and no my minimum is at least 2 car lengths just like everyone else?)
quote
Putting an automatic car in neutral (while at a stop) does absolutly nothing tangable to save on fuel. It is a complete waste of time.
quote
HAHAHHAHA wow at you absoutely don't know the difference between keeping an engine alive (littlest fuel possible) and feeding the torque converter even though your brakes are applied (some fuel is used to provide the torque)
quote
My only concern is the savings will go out the window if my starter goes out much sooner than typical.
quote
tell that to mr Wayne gredes that has over 100 k starts on his starter motor and its still the original starter (03 accord sedan that gets near 47 mpg US)
quote
Turning the engine off while coasting, I'm not convinced is a a good idea. You lose safety equipment and you have a significant delay in getting power back when you need it.
quote
it is a good idea if your a PROFESSIONAL, if your a rookie of of course you don't know what's going on or what to expect. Do you go and drag race in blind at least not knowing what to research and expect when the time comes? Only dumb shits go into unexplored territory unprepared.
but yes power brakes and power steering is lost, if your going to argue then go ahead but believe me I"VE HEARD IT ALL i do have theories that explain why you can still coast with the engine off but i will not explain it here, you really want the answer you'll find it yourself.
quote
Try no increase in MPG. Turning your engine off is so stupid. It is not even that efficiant when it is engineered into a car. I dont think you are as vigilant as a mild hybrid system and those only gain 1-2 mpg while subtracting weight from the car.
Dont be an imbecile. Modulate your use of the gas and speed but dont be a complete tool and do crazy things to save a negligable abount of fuel that you wont even notice at the pump. Damage your car to save a 100 bucks a year and that is being very generous. Good job! Trip over dimes to save a penny!
quote
as an upcoming appreitence for an automotive technicnian i hope to prove you wrong! i have talked so many techs over the subject ( and blieve me i know a lot of techs, tech instructors you name it) and they all have something interesting to say, but at least not all have submitted to the stereotyped answer like above
quote
Hypermilers will argue that they are safer than many others on the road. That may or may not be true, as hypermilers are overly aware, hyper, individuals to begin with. Your typical driver will never be as attentive as a true hypermiler. As such, they will be a danger on the road when practicing hypermiling techniques.
quote
5 years with the CHEAPEST insurance (yes if its my fault i lose my car) and counting
quote
How much fuel can you possibly save by shutting of your car? That is about the dumbest idea yet.
quote
the dumbest idea is not giving the hypermiling driving style a chance and honestly its really fucking dumb when your constantly putting money into the oil economy without realizing that YES YOU CAN MAKE A DIFFERENCE
if not then be the damn tool like everyone else or like the last comment guy said, "I am surrounded by idiots! - Lord Space Ball"
Reply
7-03-2008 @ 9:38PM
philmcneal said...
lol the typical stereotype comments that come from people THAT HAS NO OR ZERO EXPERIENCE IN HYPERMILING
those who do have seen the light
good day!
rofl.... some things never change then again enjoy being oil companies tools fools.
quote
Mythbusters did a real test by drafting a 18 wheeler in a Dodge Magnum. They drafted at various distance and computer the MPG. The did better the closer they got until they got right up to the bumper of the rig, at that point they had to feather the gas and brake so much to maintain distance that they compromised the MPG. Anyway interesting to watch but it is very very dangerous and stupid.
quote
lol mythbusters are the noobs when it comes to fuel economy, let me show you how its done (and no my minimum is at least 2 car lengths just like everyone else?)
quote
Putting an automatic car in neutral (while at a stop) does absolutly nothing tangable to save on fuel. It is a complete waste of time.
quote
HAHAHHAHA wow at you absoutely don't know the difference between keeping an engine alive (littlest fuel possible) and feeding the torque converter even though your brakes are applied (some fuel is used to provide the torque)
quote
My only concern is the savings will go out the window if my starter goes out much sooner than typical.
quote
tell that to mr Wayne gredes that has over 100 k starts on his starter motor and its still the original starter (03 accord sedan that gets near 47 mpg US)
quote
Turning the engine off while coasting, I'm not convinced is a a good idea. You lose safety equipment and you have a significant delay in getting power back when you need it.
quote
it is a good idea if your a PROFESSIONAL, if your a rookie of of course you don't know what's going on or what to expect. Do you go and drag race in blind at least not knowing what to research and expect when the time comes? Only dumb shits go into unexplored territory unprepared.
but yes power brakes and power steering is lost, if your going to argue then go ahead but believe me I"VE HEARD IT ALL i do have theories that explain why you can still coast with the engine off but i will not explain it here, you really want the answer you'll find it yourself.
quote
Try no increase in MPG. Turning your engine off is so stupid. It is not even that efficiant when it is engineered into a car. I dont think you are as vigilant as a mild hybrid system and those only gain 1-2 mpg while subtracting weight from the car.
Dont be an imbecile. Modulate your use of the gas and speed but dont be a complete tool and do crazy things to save a negligable abount of fuel that you wont even notice at the pump. Damage your car to save a 100 bucks a year and that is being very generous. Good job! Trip over dimes to save a penny!
quote
as an upcoming appreitence for an automotive technicnian i hope to prove you wrong! i have talked so many techs over the subject ( and blieve me i know a lot of techs, tech instructors you name it) and they all have something interesting to say, but at least not all have submitted to the stereotyped answer like above
quote
Hypermilers will argue that they are safer than many others on the road. That may or may not be true, as hypermilers are overly aware, hyper, individuals to begin with. Your typical driver will never be as attentive as a true hypermiler. As such, they will be a danger on the road when practicing hypermiling techniques.
quote
5 years with the CHEAPEST insurance (yes if its my fault i lose my car) and counting
quote
How much fuel can you possibly save by shutting of your car? That is about the dumbest idea yet.
quote
the dumbest idea is not giving the hypermiling driving style a chance and honestly its really fucking dumb when your constantly putting money into the oil economy without realizing that YES YOU CAN MAKE A DIFFERENCE
if not then be the damn tool like everyone else or like the last comment guy said, "I am surrounded by idiots! - Lord Space Ball"
Reply
7-03-2008 @ 9:39PM
philmcneal said...
UGH SORRY FOR THE DOUBLE POST ABG I THOUGHT YOU SENT ME A CONFIRM EMAIL DOH
Reply
7-03-2008 @ 9:46PM
Bill said...
You can save a noticable amount even with an automatic transmission if you:
1. coast in neutral (enging turns at lower RPMs)
2. turn off the engine at stoplights.
Reply
7-04-2008 @ 9:54AM
CH said...
Shutting down your engine to coast is not smart.
Forget the power steering, we did long before without it and we could handle well. What has to be a major concern is the power brakes, as soon as you merely tip on the brakes it gets harder as there is no support and suddenly you won't be able to brake at all. Another thing is the turbo (that is if you have one) as soon as you shut off the engine the turbo will no longer be feeded with oil and in a short timespan it will break down for sure. You all know how much a turbo costs to replace? Best treatment for a turbo is to turn off the engine not earlier (better a little later) than 10 seconds after you stop.
Reply
7-04-2008 @ 3:09PM
ABC123 said...
Phil you countered every argument with - yes it does work and you are wrong. Thanks for the expert advice - go back to vo-tech.
Give me actual numbers. Controlled situations. You know scientific method. I have read about the crazy guy in Madison, WI that gets crazy MPG but that guy is a menace and it seems like a miserable experience to drive like that.
If you really want to save fuel why not just ride a bike, a scooter, or a motorcycle. It is more fun than sitting in a hot no a/v, windows up car and shutting the engine on and off at every moment.
If the savings are 1-2 mpg that is hardly worth the time or effort. If you need the extra couple bucks that badly find it somewhere else, cancel HBo or something. If you are doing it to save oil - get a more efficient car or walk, ride a bike, etc.
Reply
7-06-2008 @ 7:46PM
philmcneal said...
lol i think all the mpg that the cleanmpg gains by hypermiling is more than 1-2 mpg than you think... how about 50% increase? Through all driver behavior! People seem to think that the only way to increase mileage is through technological advancement while human operators continue to act the same manner as if it was their god given right to operate an automotive with no thought to consequences of driving one.
and believe me i've look all the options, for the car I drive right now (salvage prius) any option would take YEARS to recoup my investment (i learned this the hard way when i ditched my 5spd civic for a prius even though i was saving plenty with the civic)
no bike (ok maybe pedal assisted by why bother when im getting near 60 mpgUS (3.7L/100km) + on a 10 km round trip?) Even when I asked a guy at work with a scooter with a two stroke engine i told him:
"Wow you must get great mileage in that thing!"
"yeah kinda its like a 5L tank, but I only get 100 km maybe less before i got to fill up but i'm always full throttling it and top speed is like 80 km/h (50 mph)"
lOL some savings, and believe me my beast weights 3000 lbs compared to your 300 lb bike, and you BURN OIL god fucking two stroke engines... don't give me that bus shit it costs me much less to hypermile my Prius from city to city rather than depending on a bus ticket that gets its fare raised yearly to offset the operating costs. (and has a 1hr 30 min expiry limit) Since I got family to haul and I highly doubt people in the future want to haul their family in a bus... when the fare paid for all combined family members could have paid for the gas there and back comfortably... never mind the deprecation of a car and the insurance and what not (that's why I want to become a tech :D)
as for the argument with turbos, since diesels are pretty efficient at idling, one can just coast in N neutral if they still want to reap the benefits, But i'll tell you nothing will beat infinite MPG coasting rather than 200-500 mpg coasting instead in N. But for us hypermilers we never push the turbo to begin with so maybe for YOUR KIND OF DRIVING it can be an issue, but an engine under the hands of a hypermiler I believe (and i still have to prove this one day) will have an easier life compared to the regular daily driver.
Do what your pleased, good discussion.
7-06-2008 @ 8:20PM
Wayne Gerdes said...
Hi All:
So many uninformed posting comments and especially from a site that should know green cars and habits vs. the non-sense the AAA provided.
The next time you speak with a AAA rep, ask them what their percentage above the EPA is for the last tank let alone the life of the vehicle. if they have ever sped, if they have ever tailgated or what their current tire pressures are. After you get a dumbfounded look with nothing in the way of substance in return, you can learn from Hypermilers that achieve double the EPA without any of the garbage that this story reported. Does a 24 mpg rated Honda Accord running with a lifetime of 48.5 mpg over 100,000 miles tell you something? All while following the speed limits and paying attention to everyone in all directions unlike the typical AAA representative who may have trouble achieving the EPA going downhill both ways with a tailwind :) Who is there to draft at the speed limits? Certainly not the 18-wheeler’s. Well maybe 1 in a thousand but they are not driving through Chicago, NY City, LA or any other major city we commute in. Ask the rep for their background and you will be lucky to find a marketing major without a clue as to what their current tire pressures are at let alone have a basis in any engineering discipline.
Here is the reality: http://www.cleanmpg.com/cmps_index.php?page=AAA
Good Luck
Wayne Gerdes - Owner/Admin - http://www.CleanMPG.com
Reply