popular logistics

An outfit called CNW Market Research, which advertises “Clarity Context Vision” like Fox News uses the term “Fair and Balanced,” published a “study” claiming that the Hummer H2 has less of an environmental impact than the Prius. You can look for the 450 + page report here.

CNW asserts that the per mile cost of the Hummer H2 is $3.027 and the Prius is $3.249.

Heidi Hauenstein and Laura Schewel of the Rocky Mountain Institute analyze the data and conclude that CNW’s mathematics was flawed. You can find the their report on the web pages of EV World. They say that IF CNW’s methodology is correct, the Prius has a significantly lower impact on the environment than the Hummer. And, by the way, they question CNW’s methodology.

Dr. Peter Gleick of the Pacific Institute also weighed in on the debate. (Click Here) He states “the report’s conclusions rely on faulty methods of analysis, untenable assumptions, selective use and presentation of data, and a complete lack of peer review. Even the most cursory look reveals serious bias and flaws: the average Hummer H1 is assumed to travel 379,000 miles and last for 35 years, while the average Prius is assumed to last only 109,000 miles over less than 12 years. … “Dust to Dust” has already distorted the public debate.”

So here’s what I think.

According to Edmunds, the MSRP of the 2007 Hummer H2 is $54,100. The Prius is $22,175. I assume the vehicles have a lifetime of 100,000 miles and the price of gas is $3.00 per gallon. I know that the EPA estimates for the Prius are 50, and the H2 is so big and so heavy that it is exempt from EPA milage estimates, but I use 40 mpg for the Prius - because that’s what limo drivers who use the Prius in NYC get - and 8 mpg for the Hummer. GM Hummer claims that the Hummer H3 gets 20 miles per gallon on the highway. Maybe they put a hybrid engine in it. Maybe that’s rolling downhill, outfitted for sail, with the engine off and running in neutral.

Using those assumptions, My back-of-envelope reckoning concludes that the Hummer will burn 12,500 gallons and the Prius 2,500 as they are driven those 100,000 miles. That’s a difference of 10,000 gallons of gas. At $3.00 per gallon, fuel will cost $37,500 to drive the Hummer and $7,500 to drive the Prius. That’s $30,000 bucks. And if the average price of gas is $4.00 over the life of the vehicle, it’s $40,000.

Ignoring the purchase cost, and assuming $3.00 per gallon, the fuel cost is 38 cents per mile for the Hummer, and 8 cents per mile for the Prius. Factoring the costs to purchase the vehicle, and the cost of oil changes every 3000 miles, (34 oil changes at $25 each) the costs to drive a Hummer H2 are $92,460 while the costs to drive a Prius are $30,525. This works out to 92 cents per mile for the H2 and 31 cents per mile for the Prius.

So the bottom line is I don’t care what CNW says, altho it would be nice if their arguments were logical, coherent, and based on fact. Regardless, my next new car will be an aerodynamic hybrid.