March 9, 2007

hypermiling

i know this has already been floating around, but i loved this crazy article in mojo about hypermiling, which is all about insane driving techniques to achieve incredible miles-per-gallon rates:

We take the interstate to Wayne’s house. The speed limit is 55, and most of the traffic is zipping past at 75 or so, but Wayne hovers around 50 mph. He’s riding the white line on the right side of the right-hand lane.

“Why are you doing that?” I ask from the backseat. “It’s called ridge-riding,” he explains, using another term he’s invented. He ridge-rides to let people behind him know that he is moving slowly. I imagine it’s also a way to avoid dying plastered to the grill of a semi. Ridge-riding, Wayne explains, saves gas in the rain, as it gets the wheels out of the puddly grooves in the road created by more, let’s say, traditional drivers. “People are burning fuel to throw water in the air,” he says, adding that you can hear if you’re driving in the road’s grooves or out of them.

“Buckle up tight, because this is the death turn,” says Wayne. Death turn? We’re moving at 50 mph. Wayne turns off the engine. He’s bearing down on the exit, and as he turns the wheel sharply to the right, the tires squeal—which is what happens when you take a 25 mph turn going 50.

Wayne is paying attention to the road, not the banter. He’s had to turn the engine back on earlier than he usually does after taking the death turn. “I hit the turn at 50, 51,” he says. “I should have hit it at 52.”

The morning after I arrive, Hobbit and I squeeze into the front seat of the Ranger to join Wayne on a milk run. He starts the truck—well, gets it rolling—by releasing the emergency brake and putting the gearshift in neutral before jumping out and pushing the 3,330-pound vehicle down his sloping driveway with the engine off. He jumps in and, without braking, turns right, swerves around a dead skunk in the road, and then takes a left turn—again without braking—to a stop sign. Ahead, the light is red. “This is a long light,” he says. “I’m screwed. We have to throw it away.” “Throw it away” is the phrase Wayne uses to describe what most of us do with gasoline. We throw gas away when we accelerate fast, when we turn on the air conditioning, when we leave heavy stuff in the trunk, when we drive with a roof rack, when we don’t change the oil, when we underinflate our tires, when we roll down the windows, when we speed, when we brake, or when we idle.


there are some nutty tricks, like drafting an 18-wheeler with the engine off in neutral, but for the most part it’s planning ahead and not doing the jackrabbit starts and the hard stops that kill your momentum and your engine. however it’s obvious that this guy lives nowhere near a real city with congestion, as there’s no way you can get away with a lot of this stuff in your daily traffic jams. and it helps to have lots of rolling hills, i suppose.

admittedly after reading this article, i may have tried some hypermiling techniques while driving to work. it helped that i was driving hmc’s jeep liberty, as 1. it’s got a mpg gauge so i could see how i was doing, and 2. it’s more naturally suited to not doing those gas burning sudden stops and starts. not that i would do anything foolish like coast in neutral down long hills on the freeway or offramps or anything, but i did manage to get the mpg up from 16.5 to 17.2 in just a couple of days.

on the other hand, i can’t really do hypermiling in the miata. it’s just antithetical to the whole point of driving a miata in the first place. beep beep zip bang!

Posted at March 9, 2007 9:32 AM
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