Much of the broader debate about oil understandably focuses on the current political upheaval (i.e. the Iraq War) and future political conflicts (fighting over oil with China). But it doesn’t address the question as to why we just don’t change to something else. The answer is almost always left out of this discussion: technically speaking, there is no better liquid fuel than petroleum. It’s a small point, admittedly, but it bears discussion.
Discussions on getting off oil inevitably degrade into “yeah, but” statements without a real viable alternative solution.The fact of the matter is that oil is a great fuel and energy source. This discussion would benefit from understanding why this is the case. In discussing alternatives, it would help to understand why we use what we have now. And again, I’d like to take credit for much of these thoughts, but there are some really great thought-leaders out there that have, in some form or fashion, spoken to these points in the media. But none in this kind of a pro-petrol context (which I think is important).
So what makes oil a good fuel source?
There are some very specific reasons why petroleum is a great source of energy for transportation and other processes.
Extremely high energy density
If you look at any material as a provider of energy, then oil is one of the best of them. By comparison, there aren’t many materials that have the amount of energy contained in oil distillates that exist in natural abundance.
Relative Abundance (i.e. cheap)
Aside from recent speculation on the amount of oil left on earth, there has been until recently an abundance of oil on earth. All of the supply shocks in the 70s and recently have never been due to the oil not being present – only our ability to supply it. Mostly, however, crude oil has always been extremely cheap. The oil industry emerged at the beginning of the 20th century due to its relatively low capital costs involved with extracting it (Jed Clampett just shot at a duck in his backyard and oil shot out of the ground). The 1990’s saw $10/barrel oil and, with it, massive consolidations of big oil companies – Chevron/Texaco, BP/Amaco/Arco, Exxon/Mobil.
The notion of abundance is being challenged as of late mostly because of doubts regarding existing deposits and skyrocketing demand from emerging economies (China). This not withstanding, oil in most of the world remains around the $5/gallon range. While high compared to historical prices, this price is not particularly unaffordable given the impact that transportation has on our daily lives (this is a worthy point for debate).
Easy to extract and transport
While Oil is a great commodity, what keeps it valuable is the transportation and refining network that has been created for it. Oil can affordably be extracted Egypt and sent to California for refining, and sent to Europe. Within the U.S., oil can be transported through thousands of miles via pipelines – in fact you don’t even have to wait for “your” oil to come out; just pull from the other end what you put in. Only in America. Only sometimes in Canada.
Jed Clampett aside, putting an oil platform in the middle of the ocean is still a relatively cheap and easy venture compared to the oil underneath it. If we could spend $100MM for a machine that sat in the middle of Iowa and could extract all the corn from the entire state than that would be a great deal.
Cheap to refine into many different products
Oil refining has become a very efficient and mature process through decades of refinement. Very little oil is wasted and many different products can be created from its processes. The cost of oil refining has decreased significantly in the last 75 years and currently only accounts for a small % of the price of gasoline. This is great from a technology standpoint, but it also means that any competitor has to be well-positioned in its processing cost structure. Wind and solar are doing a good job in getting scale to compete with coal. But something like hydrogen is a long way away from competing as a liquid fuel source (still too expensive to make). This underscores how hard it will be to beat oil. But we will.
Wikipedia Entry on oil refining: http://en.wikipedia.org/wiki/Oil_refining
Great MIT Talk on energy (particularly prof. Daniel Nocera’s discussion on energy solutions).