Gas(p) Gulping to Oregon
What are we thinking? Or do we think at all? I drove to Portland this weekend to visit my daughter. Now I admit to being one of those hyper-mileage nuts. I own a hybrid and averaged 47 mpg. That’
What are we thinking? Or do we think at all? I drove to Portland this weekend to visit my daughter. Now I admit to being one of those hyper-mileage nuts. I own a hybrid and averaged 47 mpg. That’
What amazed me was, with rare exception, I didn't pass anyone! Just the opposite, I estimate that about 200 cars passed me during the trip and they bested my speed on average by 6 to 7 miles per hour. The average highway mpg for standard size cars these days is about 27 mpg. Now with my car, if I go 10% over the speed limit, I lose about 10% in fuel efficiency. So by my really crude calculation and a dangerous generalization, those 200 cars (many were trucks and SUVs which do worse) were wasting 2.7 mpg in efficiency by passing me. So what does that add up to? Check my math, but for a 540 mile trip, that works out to about 2.2 gals per car times 200 cars or 440 gals! You can do more multiplication and begin to realize the immense amount of wasted fuel across our country per day
You can say my assumptions are a bit fuzzy and maybe that number should be less and I might agree. And hopefully I won't be embarrassed by bad math. But the point is pretty obvious, and I don't intend to moralize. (After all I did drive to Portland). I think that we have given up critically examining our behavior as individuals and as a society. For all of the public discussion and publicity on energy, oil and climate, us road warriors in the ecologically aware Evergreen State are still going like a bat out of hell. Go figure.....and don't get me on the question of compact fluorescent light bulbs.
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Comments by Readers
Tip Johnson
Feb 20, 2008I love rough figures! They can be extremely illustrative without the tedium of more precise calculations. And they can be plenty good enough, for instance:
We know there are more registered vehicles than people in most metropolitan areas. We know that cars costs, on average, between 4 and 7 thousand dollars a year to keep running, depending on whether you finance, etc.
Therefore, we can multiply the population of a town by a conservative $5k to get a rough idea of what we, as a community, take into a supposedly free market to make supposedly rational economic decisions about transportation.
O.K. Let’s round Bellingham up to 80,000. Times $5,000 is a measly $400,000,000 a year we spend to traipse around in our gas guzzlers. How many times would we need to spend that kind of budget to solve the problem? We’d get the ecology for free and end up with a lot of extra cash in the economy, to boot!
Now, take your average human, breathing a half a liter about fifteen times a minute. Compare that to your average, small economy car burning a liter and a half about 1,500 times per minute. Whoa! That’s about three hundred times as much oxygen per unit of operation. Considering that the useful atmosphere for oxygen burners is a thin layer of about two miles thick around the planet, you think we’d ask ourselves whether internal combustion was really that good of a long-term survival strategy!
But we don’t!