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On the Drive Low

Alexandra_PaulcropNote: For more from Alexandra, visit the "Ask Alexandra" tab on the Chevrolet Volt Facebook page.

When it comes to getting the most range out of my electric cars, I have learned from the best: Paul Scott (seen here with me in the photo on the left) and William Korthof.

I drove 20 miles with Paul on LA freeways during rush hour, and he didn’t touch the brakes once. He says accelerating after braking is a major energy-eater, so he kept a good distance between him and the car ahead and an eye far in front to assess the clearest line so he didn’t have to brake. He only slowed down using the RAV “regen” button (which approximates “low” in a gas car but sends the energy wasted from slowing back into the battery). I was riveted. Even though it was 5pm, traffic was going a respectable 50 miles an hour, but there were a lot of cars on the road; not touching the brakes was no easy feat.

William has driven over 150 miles in his 2002 RAV 4 EV, while the farthest Ian and I have gone is 109 miles.

William’s hypermiling tips on surface streets include braking as little as possible when approaching a stoplight. This means keeping an eye far up front and using Regen to slow down, like Paul does. William accelerates as gently as possible when the light turns green. He likes a constant light foot on the accelerator (or “go pedal” as my friend Darell D at www.evnut.com calls it, since EVs don’t have a gas pedal). Here, I stray: I like to get the car up to speed  (as slowly as my impatient self can handle) and then just tape the accelerator to keep it there. There are differing schools of thought here – is it better to keep the car at a steady pace or let it coast a bit and then nudge it back up to speed?

In the Volt, the Low gear also sends energy back into the batteries, and I use it to slow me down  instead of braking like Paul and William use the Regen button in their RAVs. But because I like the forward momentum of electric drive, and Low doesn’t allow that, I remain in D for most of my driving.

There is, however, an interesting thread about the range benefits of driving in Low on this site.

One Volt driver believes driving in L gets better range, but he only gets 33 miles per charge and I get over 40 mpc unless I have to go up our 2.5 mile hill too many times in a day.

This blog is more up my D alley.

I will have to ask my mentors, Paul and William, what they think about these Volt philosophies. Along with more experimentation in my Volt, I know I can become an even more efficient driver.

For now, I remain a diehard D driver.

Alexandra Paul is a longtime electric vehicle advocate, actress and former EV1 driver. She is working with Chevrolet to educate consumers about EVs and the Volt. Full disclosure, Chevrolet is paying her for her time, but her opinions will always be hers.

Comments (10)Add Comment
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written by Evan, February 24, 2011
Wilhelmina you're pretty much right on the money. You look at people driving in the city and its pedal to the floor all the time. Gas-brake-gas-brake. That is absolutely terrible for your gas mileage. All it takes is a little relaxation on your acceleration. If the light ahead of you is red, there's no reason to floor it just to come to a stop again... You definitely don't have to drive like a grandma, I've heard at least one person who gets over 40 MPC in sport mode.

Shadetree, an average car engine typically achieves an efficiency in the 30-40% range as you said, and yes oil and coal power plants are in the same ball park. But the number of oil plants is very low these days, and coal, well we've got tons of it all over the country so at least we don't have to buy it from the middle east. But then you're also forgetting about wind, natural gas, methane, and nuclear. A natural gas or methane turbine can reach efficiencies of nearly 60% (some of the methane even comes off of landfills). The last factor that you didn't account for is the refining of gasoline, which isn't the most efficient process in itself.

No the Volt's not perfect, but it's a step in the right direction. Until fuel cells and efficient hydrogen come about, or better batteries, you really cant get too far from the good ole ICE.
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written by Alexandra Paul, February 21, 2011
Yes Wilhelmina, you are correct. It sounds like you are perfect to drive the Volt and get great range, as long as where you live is not too cold. Or hilly.
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written by wilhemina, February 21, 2011
I read this blog with interest, and didn't at all glean that the driving described therein was pokey or grandmotherly. The truth is that many of our current driving techniques may make us feel like mario andretti, but they really don't gain much, if any, time. Jamming on the gas pedal off the green light is a great example. it feels good, yes. But you simply come up faster to the bumper ahead of you. Big deal. I say this from experience: I am that annoying driver who passes the earnest (read: slow poke) driver ahead, with a Take That Buster acceleration, only to find myself shoulder to shoulder at the next light. So why not practice some even thoughtful and gradual pressure on the pedal, it all works out in the end. And Alexandra seems to make it clear that you can drive like a normal person (65 mph lets say, maybe even 70) and get great MPG as long as the way you get that speed is sane, and you exert some conscious pedal control. Am I right here?
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written by Alexandra Paul, February 17, 2011
Shade Tree : If I gave the impression that one has to drive like a grandma to get 40 mpc, then I didnt communicate properly. The simple habit of not keeping your foot on the accelerator constantly when in D improves range greatly. Paul Scott is right when he comments that efficiency doesnt mean pokey. New drivers not in the loop on how to drive for max range will learn when they see they are not getting the miles their friends are, although I agree that salepeople are educating Volt buyers more about Onstar features than techniques on how to get max range, unless it entails pushing a button.

Mark Swain, Customer Advisory Board member, has encouraged me to drive in L for a week and see how my range is. I will do that and report back.
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written by shade tree, February 16, 2011
the 37MPG is the EPA rating for the Volt combined city/hwy mileage. Of course the Volt's trip computer calculates absurdly high MPGs since it elects to count EV miles as free. Even the EPA rates those as an equivalent 94MPG. Of course electricity isn't free and neither is replacing a 16Kwh battery once it dies out of warranty.
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written by stu, February 16, 2011
Have no idea where the 37mpg came in but I have had a Volt for a little over a month now, driven about 1800 miles and use 40-44 miles a day on elect before the engine kicks in and am averaging about 106mpg overall. Definitely a Prius killer. Cheap? Definitely not-a little over 50K out the door..but satisfying, hell yes.
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written by shade tree, February 16, 2011
No one is arguing what is better for the environment, just GM markets this as a car that can be driven like average people do now with an average of 40 mile range. Obviously the average/majority of drivers out there do not drive a vehicle as efficiently as possible. I just want to make sure that if I get 45+MPG from my Prius now driving mildly aggressive in harsh conditions (traffic, short trips, A/C&heat use) etc but not any more aggressive than the average drivers in my area that I could expect to get 40 miles per charge but apparently that might not be the case. As far as what is better for the environment that is also unclear, the Volt though producing zero emission while driving on EV is simply an emissions displacement vehicle. If you are one of the lucky few on solar or maybe even hydro power you can feel good driving it under electricity, but for the majority of the country that uses fossil fuels its not really that much better for the environment. From what I have researched, the modern car engine is about as efficient as most power plants at producing power from stored fuel energy (30-40%?) and that if you drive a car like the Prius and many newer standard model ICE based cars that are PZEV certified, you actually produce less emissions than a typical fuel based power plant per unit of energy used. I understand the Volt is not even PZEV certified when running on extended range though that might be in the works for the future. Also the Volt is not as efficient at translating fossil fuel to actual displacement capability once in extended range as other efficient vehicles out there (thus the 37mpg on fuel).
Don't get me wrong, I'm all for new technology and the days of standard ICE vehicles are numbered, but IMO the Volt is more of a stop gap at best, and a costly one at that which I'm not sure if the environmental benefits even outweigh those of a traditional efficient car/hybrid and certainly don't dollar wise over the life of the vehicle.
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written by Paul Scott, February 16, 2011
Shade Tree - It's not a matter of driving like a "grandma", it's a matter of driving efficiently. When I'm driving my LEAF or RAV EV on the freeway, I use techniques that maximize how far I can go on a kWh. I watch everyone else around me driving as though efficiency was the last thing on their mind, and I notice that they are not getting down the road any faster than I am. They are, however, using much more energy and polluting my air a lot more than necessary in the process. Add to that the fact that they are sending more money out of the country, weakening our economy, and even worse, they are sending some of that money to our enemies who use it to buy the bombs and bullets that are killing our soldiers.

These are the consequences of driving inefficiently.

Before you criticize efficient driving, you might want to consider all the ramifications of how you drive on the innocent people who breathe the pollution you generate, the soldiers who fight and die so you can have cheap gas, and the horrible mess our economy is in because we have to spend 45% of our national trade deficit for foreign oil.
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written by shade tree, February 16, 2011
wait, so one has to drive like a grandma (not only to the driver's displeasure but those of everyone around you) in order to squeeze 40 miles from the Volt battery?? I thought 40 was supposed to be the average for the average driver with 25-50 miles being the typical range depending on conditions?
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written by Evan, February 16, 2011
From what I have come to understand, your driving habits have a big impact on which mode you choose. Each mode is designed as efficiently as possible, but you have to cater to its preferred type of driving. If you are a strong "hypermiling" driver, the L mode is the way to go. But if you drive with a more constant speed, then D is going to work a little better for you. Ive even heard of people getting over 40mpc in sport mode!

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