Showing posts with label gasoline. Show all posts
Showing posts with label gasoline. Show all posts

When Blogs Work and Politics Don't: The Tire Pressure Debacle


The Tire QueenRight wing reaction to Barack Obama's comment about tire pressure is yet another example of how political discourse has devolved in this country. It says so much about the world today that a politician can be mocked for saying that properly inflating the tires on our cars could save more oil than would be produced by an oil drilling program proposed by his opponent. Even if you favor said drilling program, you have to be brain dead to downplay the value of proper tire pressure when gas is $4 a gallon (by defiintion the only people who aren't interested in reducing their gas consumption are those who are too rich to notice the price at the pump). Fortunately, this storm in a glove box has led to some good blog posts, like this from Dan Neil in the LA Times. Here are my own random thoughts:

1. My father taught me to check the pressure in the tyres of the family car on a regular basis, probably because I learned to drive in a country that typically pays 3 times as much as America for gasoline.

2. I have routinely fumed about under-inflation in America since I moved here in 1976. Few things irk me more than driving down the Interstate behind a car or minivan or SUV that has obviously not got enough air in its tires. Even when gas was cheap, wasting it was wrong. Not to mention the negative effects on tire wear, braking, safety, etc.

3. America badly needs educating about tires. A lot of people have no idea what the pressure should be or how to check it accurately. Factors like temperature and load are largely ignored. Read Dan's blog. Read the articles on this site. Have a family meeting to make sure all drivers are with the program.

4. Driving on properly inflated tires is something real you can do to reduce our reliance on foreign oil, so if you can't be bothered to do it, what standing do you have in the national debate?

So be a patriot and invest $10 in a decent tire gauge, then use it, regularly. Please.

Cost of Diesel Dampens Hopes


While the price of diesel fuel is not directly related to gyroscopically stabilized transportation, it does raise questions about efforts to improve the fuel efficiency of the transportation system and reduce dependence on foreign fuel.

My wife and I own a diesel-powered Jeep Liberty which we like a lot, but the high price of diesel in the U.S. is really making it hard to justify. We regularly see diesel sold for a premium of around 35 cents per gallon over regular unleaded gasoline. In rough terms this means a diesel vehicle has to get 26 miles per gallon versus 22 for a gasoline model, or 35 versus 30. In other words, the economic incentive to use deal just isn't there is diesel is priced significantly higher than regular gasoline.

In thinking about this problem I visited the EPA site fueleconomy.gov which has a cool feature that let's you compare vehicles. I commared a diesel Jeep with a gasoline Jeep, and at first it seemed the diesel was a better deal. But then I noticed the figures that the EPA used for fuel costs. They were not what I am seeing at the pump. Fortunately, and this was a smart move by the site designer, you can input your own numbers. That produced the following:

The diesel is $60 a year cheaper. Hardly enough incentive to overcome the downsides (such as searching for a gas station that carries diesel).

Maybe the new rules on diesel fuel will improve matters and the price will be equalized, but right now there seems to be a pause in diesel production as manufacturers switch over to the new designs (for an explanation, see here and also here).

That means you can't buy 2007 Jeep Liberty diesel right now. But Jeep Grand Cherokee diesels will turn up in showrooms later this year. Sadly, if diesel/gas pricing does not move closer to par, the economic incentive to buy them will not be there when they do.