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| CAFE and Cream: The Rules about Corporate Average Fuel Economy |
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| Written by Aaron Severson |
| Monday, 29 September 2008 00:00 |
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There's been a lot of talk in the U.S. in the past year or two about the prospect of raising the requirements for average fuel economy. Current plans call for raising that average from 27.5 to 35.7 mpg by 2015, which has caused considerable alarm in some quarters. BORN IN CRISISThe current U.S. rules on average fuel economy are a direct result of the 1973 oil crisis. In October 1973, during the Yom Kippur War, the Organization of Arab Petroleum Exporting Countries (many of the member states of OPEC, plus Syria and Egypt), declared an embargo on oil shipments to the U.S. and its allies, in retaliation for their military support of Israel. The embargo lasted until March 17, 1974, quadrupling the price of oil and leading to widespread shortages. In the U.S. (and some parts of Europe) there was a return to fuel rationing for the first time since 1945.
The first energy crisis was an economic disaster, and it made clear how much damage even a temporary shortfall in oil supply could do. It provided the political will for America's first serious effort at energy conservation. In December 1975, Congress passed the Energy Policy and Conservation Act (EPCA). The act empowered the National Highway Traffic Safety Administration (NHTSA) to set standards for the Corporate Average Fuel Economy (CAFE) of cars and trucks sold in the U.S., with the first standards taking effect for the 1978 model year. The purpose of the CAFE rules was to browbeat the domestic manufacturers into building more fuel-efficient vehicles by penalizing them for producing too many gas-guzzlers. The NHTSA set "target minimums" for CAFE, and levied substantial fines against any manufacturer whose fleet did not meet the target. HOW CORPORATE AVERAGE FUEL ECONOMY IS CALCULATEDCAFE is the harmonic mean (weighted average) of the fuel economy ratings of all the cars or trucks a manufacturer produces. The fuel economy number used is calculated based on laboratory test results (similar to those performed by the EPA to generate the fuel economy estimates you find on the window sticker of a new car). The NHTSA uses a combined fuel economy figure, a weighted average of the city and highway figures. Those combined fuel economy numbers are weighted on the basis of total vehicle production -- vehicles that are produced in large numbers count more, while those produced in smaller numbers count less.Let's say that a manufacturer produces 100,000 vehicles a year. 20,000 of these are a large car that gets 22 mpg (10.7 L/100 km) combined, while the rest are a smaller car that's rated at 30 mpg (7.8 L/100 km). The automaker's CAFE is: 100,000 / ( (20,000/22) + (80,000/30) ) = 28 mpg (8.4 L/100 km) If it sells an equal number of large cars and small cars, its CAFE is: 100,000 / ( (50,000/22) + (50,000/30) ) = 25.4 mpg (9.3 L/100 km) Since many automakers build at least some of their cars here and others overseas, each passenger-car fleet is divided into separate "domestic" and "import" fleets, each of which is supposed to meet CAFE requirements separately. "Domestic" is defined as a vehicle built with at least 75% U.S. or Canadian content, regardless of badge; a U.S.-market Honda Accord, built in Marysville, Ohio is considered a domestic car. The distinction between the domestic and import fleets was created as a political concession to the United Autoworkers union (UAW), which was afraid that Detroit would try to meet the CAFE requirements by re-badging cars built overseas, in nonunion factories. PENALTIES AND CREDITSIf a manufacturer's CAFE numbers don't met the target minimum, the company has to pay a civil penalty. The current penalty is $5.50 for each tenth of a mpg the actual average falls below the target, times the manufacturer's total production. For example, the current target minimum is 27.5 mpg (8.6 L/100 km); if a manufacturer produces 500,000 cars for 2008, with a CAFE of 27.0 mpg (8.7 L/100 km), the manufacturer would be fined ($5.50 x (0.5/0.1) x 500,000) $13,750,000.If a manufacturer's CAFE exceeds the minimum, the manufacturer earns credits, which can be applied to balance out their CAFE for previous or subsequent model years. For example, if the manufacturer who was penalized in the example above raised their CAFE to 28.5 mpg (8.3 L/100 km) the following year, they would earn a credit, which they could potentially apply to offset the penalty from 2008. This is called a "carry back." Carry backs can only be applied within a three-year period, and only with NHTSA approval; you can't get out of the fine by saying you'll apply a credit at some arbitrary point in the distant future. INDUSTRY REACTIONAt that time these rules were written, the fuel economy of American cars was at an all-time low. The average fuel economy for the entire domestic industry in 1973 was 12.2 miles per gallon (19.3 L/100 km). Part of the reason for that thirst was the recent advent of pollution controls, which cut into engine efficiency, and of safety standards, which made cars heavier. Even so, the American automobile had been growing at an average rate of about an inch a year since the early 1950s. Full-sized cars, which still represented the majority of sales, were over 18 feet (5.5 meters) long, and tipped the scales at around 5,000 pounds (2,268 kg). Ford, Chevrolet, and AMC had (somewhat reluctantly) introduced their first subcompact models in 1970 and 1971, but these represented only a small percentage of the market. Most Detroit executives were contemptuous of small cars, which they saw as appealing only to the poor and the lunatic fringe.The oil embargo left the domestic automakers more open than they might otherwise have been to the prospect of higher fuel economy. Sales of big cars had plunged vertiginously during the oil crisis, although they began to recover once the crisis had completely passed. Still, Detroit was not at all keen on the idea of being required to improve their average fuel economy; they already felt unfairly burdened by safety and smog regulations. With everyone's memories of the grim winter of 1973 still fresh, however, their lobbying efforts found little political traction. The original legislation called for the target minimums for fuel economy to increase progressively, up to 27.5 mpg (8.6 L/100 km) for the 1985 model year. To meet the targets, domestic automakers had to "downsize" their large and intermediate cars, use smaller-displacement engines, and start paying more serious attention to aerodynamics. The biggest V8s disappeared, and automakers turned increasingly to six-cylinder and four-cylinder engines. The automotive press widely predicted that V8s would vanish completely by 1984, particularly after a second energy crisis in 1979, sparked by the Iranian revolution. Instead, in the 1980s, oil prices began to fall, and the political support for the CAFE targets eroded. (The Carter administration also began deregulating oil prices and removing the windfall tax penalties on oil companies, a process the Reagan administration continued with enthusiasm.) Although the CAFE target for 1985 was indeed 27.5 mpg, as stipulated by the original regulations, automakers successfully lobbied to have the target rolled back to 26 mpg (9 L/100 km) for the 1986-1988 model years, 26.5 mpg (8.9 L/100 km) for 1989. The target didn't return to 27.5 mpg until 1990. Several subsequent attempts to increase it failed, so it has remained frozen at the 1990 level. As improving technology boosted engine efficiency, it became possible to meet that target with larger and more powerful cars. The downsizing trend of the late seventies ended, and cars began to get bigger once again. V8 engines, which had supposedly been on the verge of extinction, suddenly became all the rage for luxury cars, prompting even European and Japanese manufacturers to develop V8s, primarily for the American market. TRUCKS AND SPORT UTILITY VEHICLESWhat about trucks? The EPCA also gave the NHTSA the authority to set requirements for truck fuel economy, but defined the rules a little differently. A full-sized pickup truck, intended to carry heavy loads, couldn't reasonably be expected to achieve the same fuel economy as a compact car. Rather than set specific targets for truck mileage, as it did for cars, the regulation called for truck fuel economy to be set at the "maximum feasible level," which the NHTSA determines for each model year. The first target, applied to the 1979 model year, was 17.2 mpg (13.7 L/100 km) for 2WD trucks, 15.8 mpg (14.9 L/100 km) for 4WD. (The separation between 2WD and 4WD was dropped in 1992.) By the late 1990s, it was up to 20.7 mpg (11.4 L/100 km).Until 2008, the truck rules applied only to light-duty trucks, those with a GVWR (gross vehicle weight rating -- weight with passengers and cargo) under 8,500 pounds. Really big trucks, like Ford's late, unlamented Excursion, were exempt. Starting in the 2008 model year, "medium-duty" vans and SUVs with a GVWR of 8,500 to 10,000 pounds are now counted in a manufacturer's truck CAFE. Open-bed pickup trucks are not, but they will be, starting in the 2011 model year. When the truck standards were written in 1975, legislators made two logical but incorrect assumptions. First, they assumed there was an easily definable difference between a passenger car and a truck. Second, they presumed that trucks were primarily working vehicles, purchased by businesses, building contractors, farmers, and other professionals. The idea that people would buy trucks in large numbers as substitutes for passenger cars apparently didn't occur. This was a curious lapse, since car-based utility vehicles (notably, coupe-utilities like the Ford Ranchero or Chevrolet El Camino) had been blurring the lines between car and truck since the 1920s. At the same time, 'real' trucks had been growing progressively more civilized and livable. By the mid-1970s, the prospect of owning a truck as an 'only car' was far more palatable than it had once been. In the wake of Vietnam and Watergate, also, the cowboy image of trucks became increasingly appealing to a generation of disaffected Baby Boomers. In the late 1970s, the sales of trucks surpassed those of passenger cars, and only some of those trucks were being sold to ranchers or businesses. Automakers embraced the truck boom with relish. Since trucks didn't have to meet the same safety, emissions, or fuel economy requirements as cars, they did not need to be nearly as mechanically sophisticated. The large production volume lowered manufacturing costs, and adding luxury features enabled posh trucks to be sold for premium prices, making them highly profitable. The profit margins became so enticing that other manufacturers got into the game. Automakers began to shortchange their passenger-car development to invest more in trucks. The popularity of trucks -- and the fact that they continue to be held to lower standards than cars -- has brought the industry's average fuel economy down quite a bit. For example, in 2007, light trucks accounted for 52.3% of the U.S. market, with total sales of 8,442,717, out of 16.1 million vehicles sold in total. The CAFE target for trucks last year was 22.2 mpg (10.6 L/100 km) compared to 27.5 mpg (8.6 L/100 km) for cars. If we assume that all manufacturers exactly met the targets, the combined 2007 CAFE for the entire industry would be: 16,143,002 / ( (8,442,717 / 22.2 mpg) + (7,700,285 / 27.5 mpg)) = 24.4 mpg (9.6 L/100 km) Let's imagine that in the same period, only 10% of the market bought trucks and SUVs -- the professional buyers the regulators assumed were buying trucks. In that case, the industry CAFE would be: 16,143,002 / ( (1,614,300 / 22.2 mpg) + (14,528,702 / 27.5 mpg)) = 26.9 mpg (8.7 L/100 km) In short, the high percentage of truck sales has reduced the overall fuel economy of the domestic fleet by more than 10%. (An important side note in all these calculations is that they really refer to gas mileage, rather than fuel economy. To encourage automakers to develop alternative-fuel vehicles (i.e., cars and trucks that can run on ethanol, E85, compressed natural gas, hydrogen, et al), the NHTSA allows automakers to divide the actual fuel economy of their alternative-fuel vehicles by 0.15 when calculating CAFE. For example, a flex-fuel truck with a combined rating of 15 mpg (16.7 L/100 km), burning E85 or natural gas, counts as 100 mpg (2.4 L/100 km) for CAFE purposes. There's a cap on the maximum amount that alternative-fuel vehicles can increase a manufacturer's overall average -- currently, 0.9 mpg (261.3 L/100 km). Even so, building modest numbers of flex-fuel vehicles is a cheap way for a manufacturer to bolster their averages.) CONTROVERSYThe CAFE requirements have been controversial since they were first introduced, and many feel they are a mistake. Automakers hate them because they argue that the rules force them to build cars that customers don't necessarily want to buy, and penalize them for offering the large, powerful vehicles that consumers prefer. Free-market conservatives feel that the market would do a better job of regulating fuel consumption than the NHTSA. They will no doubt point out that this year, thanks to the spike in fuel prices, truck sales are down more than 30%, which will raise 2008's actual industry CAFE more than any legislation realistically could. Historians will also observe that GM's move toward downsizing its big cars in the 1970s, which led the industry trend, was in the works before the EPCA passed -- it was prompted by the oil embargo, not CAFE.Your author is among of the minority who feel that CAFE is fundamentally a good idea. Our reasoning goes like this:
Opponents of CAFE insist that the rules restrict consumer choice, and that raising the target minimums above their current levels would force customers to buy cars they don't want. Without these rules, however, buyers who want more efficient vehicles would frequently be out of luck. Consumers do not design cars; if a buyer needs a car and is interested in fuel efficiency (or low CO2 emissions), his or her choice is to either pick the best of what's available or wait until the next economic downturn, to see if automakers bring out something better. Not much of a choice if you need a car now.
The purpose of the CAFE rules is to provide a leveling effect, to push manufacturers to offer fuel-efficient vehicles even when economic conditions are good and fuel prices are relatively low. It also gives automakers a financial incentive to raise the fuel economy of their most popular models -- since the better a model sells, the more heavily its fuel economy is weighted for CAFE -- and to try to make more-efficient cars that people actually want to buy. (If you need an example of a fuel-efficient car was not designed to make people want to buy it, we suggest that you test-drive the Chevrolet Aveo or its misbegotten sibling, the Pontiac G3.) The main problem with CAFE is that by current standards, the rules aren't particularly stringent. The target fuel economy for passenger cars is still the one set in 1975, and has not been adjusted in 18 years. The standard for "trucks" -- a term that has become so vague as to be useless -- remains 22% lower than that of passenger cars. Nor are the penalties for failing to hit the target minimums are no longer particularly daunting. A $15 million NHTSA fine is less than manufacturers typically spend on wheelcover designs for a new model; it's expensive, but not a major deterrent. Some European manufacturers, notably BMW and Ferrari, simply ignore the CAFE requirements, and pass the cost of the fines along to their customers. Your author believes that CAFE is a valid tool for encouraging higher fuel efficiency -- not a panacea, by any means, but useful. For it to work, however, the bar needs to be raised, the penalties for noncompliance increased, and the loopholes (most particularly the disparity between car and truck standards) reduced. Automakers and their supporters frequently complain that meeting higher CAFE requirements isn't feasible. It's important to remember, though, that they've been saying the same thing for more than 25 years, during which time the technology to build more fuel-efficient cars (even without resorting to hybrid technology or diesel) has only improved. What is lacking is not the means -- only the will. # # # NOTES ON SOURCESOur principal sources for this article included "CAFE - Fuel Economy" (no date, National Highway Traffic Safety Administration, http://www.nhtsa.gov/fuel-economy, accessed 22 September 2009), in particular "CAFE Overview - Frequently Asked Questions (18 December 2001, National Highway Traffic Safety Administration, http://www.nhtsa.gov/cars/rules/cafe/overview.htm, accessed 22 September 2009); "EPA's Fuel Economy and Emissions Program" (EPA420-F-04-053 Fact Sheet) (October 2004, U.S. Environmental Protection Agency, http://www.epa.gov/fueleconomy/420f04053.htm, accessed 21 September 2009); U.S. Congress, Office of Technology Assessment, Improving Automobile Fuel Economy: New Standards, New Approaches, OTA-E-504 (Washington, DC: U.S. Government Printing Office, October 1991); and the Wikipedia page on Corporate Average Fuel Economy (http://en.wikipedia.org/wiki/Corporate_Average_Fuel_Economy, accessed 22 September 2009).
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I agree with you that in principle, enforcing fuel economy improvements is necessary and good in the long term.
Unfortunately (as you pointed out), it's had the net effect to push auto-makers towards making (and thus selling) more "trucks".
The biggest casualty of this has been the car-based station wagon, which would meet the needs of many a current SUV buyer. Wagons currently hurt automakers under CAFE (as they typically get a few MPG less than the coupe/sedan they're based on). If CAFE worked properly, it would motivate buyers out of SUVs and into wagons.
As I understand it, the most recent revision to CAFE standards passed this year will enforce MPG as a function of "vehicle footprint", literally the area under the car. How much more absurd could it get?
This gives automakers every incentive to make cars larger, and fails to take into account things like cargo or seating capacity. Let alone intended use.
This is the tragic result of a battle between automakers who'd rather not see any regulation and lawmakers whose automotive world-view consists of Lincoln Towncars, Black Suburbans and "hybrids" (the well-known solution to everything).