great article john. thanks for turning me onto hypermiling.

Yeah! Let's all coast behind other vehicles to save gas. Weee look at me I just rear ended a family of four but I improved my gas mileage by a whooping 2mpg. The whole driving without brakes thing is brilliant too! I mean who needs to stop anyways. It’s good to try ways to improve efficiency but maybe we should focus on things like car pooling or perhaps taking a bus. Why not avoid getting in your car in the first place to drive halve a block to the nearest Starbucks when you could just stay home and brew your own coffee instead. I really don’t need a gauge to tell me just how much I am wasting energy, I already know that, I'm an American darn it!

"such as coasting in the draft of semis"
if by that you me tailgating a semi then i say you better have good insurance. im a truck driver and i drive thousands of miles a month and see alot of accidents. By "coasting" you wont be able to see the traffic ahead of you and youll be in the truck drivers blind spot. very very imature.
try driving with you're shoe off you'll get a better feeling of the gas peddal.

You want to improve gas mileage and cut CO2 emissions and help improve the environment ? Don't sit in the drive up at McD's. Do something radical....park turn off the engine and walk inside to place your order. Geez...that would be getting exercise...something alot of Americans need these days.

My new Avalanche also has a real-time fuel efficiency readout. It's cool to see 2 mpg upon acceleration and a up to a whopping 99 when coasting. It's really not too bad, I have averaged about 14 mpg so far.

What we realy need is the alternive power, Hydrogen, Electric and even compress air engines. Stop with the "Fuel Efficiency" and break-a-way from the old fashion fossil fuels.

My '97 Chevy Blazer has a fuel usage guage! It also gets better mileage tyhan this P. O. S.

The funny thing is he drives 2 hours per day to work and then claims to be saving money? How about getting a job a little closer or ride sharing with someone, or maybe moving closer to work. If you want to save gas its easy... DRIVE LESS!

While I agree w/ others about drafting in real world driving (race track only, please), the idea of brakeless driving in this instance means being aware of what's going on ahead of you to the point that you can lift off the gas and glide down to the slowup/stop ahead of you using little or no brake pedal. Most drivers in todays world go directly from the gas pedal to the brake, wasting the energy used to get up to speed in the first place, and putting unnecessary wear on the brakes. In the absence of regenerative braking in hybrids, this gas-to-brakes technique is wasteful. This will also teach the average driver, who is blissfully unaware of what is going on ahead of him or her, the opportunity to be prepared for unexpected deceleration by the driver(s) ahead.

It's always a delight to read the sarcastic diatribe of some smugly self-righteous know-it-all who can denigrate the content of an article and simultaneously lecture the rest of the Great Unwashed about their egregious laziness...particularly when the author didn't make the minimal effort necessary to properly use the language (or at the very least, a SPELLING CHECK).

You know who you are...