CAFE and You, Part 2 – Does CAFE Work?
In our last segment, we looked at the history of CAFE and how it was born from unintended consequences and governmental meddling in foreign affairs and markets. The stated purpose of CAFE (and the EPA from which it sprung) in the Energy Policy and Conservation Act of 1975 was to reduce our nation's dependence on foreign oil.
By any accounting on that standard alone, CAFE has failed miserably. Neither the Environmental Protection Agency nor the CAFE requirements have reduced our import of foreign petroleum. Our importation has increased thousands of times over what it was in the late 1960's and early 70's before OPEC and the oil crisis.
Today, we think of CAFE as the standard that requires automakers to produce more fuel efficient vehicles. By that measure, these regulations are a hit-and-miss success. Most measures, usually based on numbers given by the EPA (whose interest would very obviously be in showing itself to be useful), show that economy has improved greatly thanks to regulators forcing higher miles per gallon requirements on automakers.
CAFE Is Largely a Failure
The truth regarding how successful CAFE has been in reducing fuel economy is much less black and white than the EPA may wish you to believe. In New-vehicle characteristics and the cost of the Corporate Average Fuel Economy standard published by the RAND Journal of Economics (V.43, No.1, Spring 2012), Klier and Linn chart fuel economy gains vs. various market factors including CAFE from 1975 to 2008.
In a chart whose numbers are sourced from the EPA, fuel economy and CAFE regulation targets are almost entirely parallel, line for line (Section 4, Figure 1) up until the first set of standards are met (about 1985). At that point, the CAFE requirements actually lowered, but average fuel economy kept rising. When CAFE rose again to meet MPG numbers, CAFE flatlined at the ~27mpg that was the standard through the 1990s and early 2000s, yet fuel economy continued to rise, though more slowly than on its rapid jump in the 1970s and early 80s.
When EPA numbers are ignored (sourcing instead from Ward's Automotive) and other vehicle factors such as weight and power are considered (Section 4, Figure 2), we see that upon introduction of the MPG requirement in 1975, vehicle weight averages drop significantly and power dips noticeably while fuel economy begins its rocketship climb. Then, when technology caught up to the MPG requirement during the 1980s, weight began rising again, as did power. What's missing from this chart, but referenced elsewhere is that late-70s and early-80s weight reduction meant a sharp increase in traffic fatalities.