| rice_classic |
03-15-2013 12:49 AM |
And this explains why we're not getting the 2014 Mazda 6 Wagon.
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Despite being based on a Neon platform and retaining the dimensions of a compact car, it was classified as a light truck by NHTSA. The PT Cruiser was designed to meet NHTSA standards for classification as a light truck, for the express purpose of raising Chrysler's light truck average fuel economy. At the time, the minimum fleet average for passenger cars was 27.5 mpg CAFE, while for light trucks it was 20.7 mpg CAFE. A small, four-cylinder vehicle like the PT Cruiser was effectively a "ringer" for Chrysler's fleet average. The year 2000 CAFE targets discussed above translate to 21 mpg IRL for passenger cars and 15 mpg IRL for light trucks. A "light truck" like the PT would obviously have no trouble surpassing these standards.
In 2006, CAFE altered the formula for its 2011 fuel economy targets, by calculating a vehicle's "footprint", which is the vehicle's wheelbase multiplied by its wheel track. The footprint is expressed in square feet, and calculating this value is probably the most transparent part of the regulations. Fuel economy targets are a function of a vehicle's footprint; the smaller the footprint, the tougher the standards are. A car such as the Honda Fit, with its footprint of 40 square feet, has to achieve 61 mpg CAFE, or 43 mpg IRL by 2025 to comply with regulations. At the opposite end of the spectrum, a full-size truck like the Ford F-150, with a footprint of 75 square feet, only needs to hit 30 mpg CAFE, or 23 mpg IRL, by the same timeframe.
How the fix is in
On the surface, the footprint requirements can be viewed as logical; a compact, fuel-efficient car like the Honda Fit, should be able to hit tougher targets, by virtue of its small size, aerodynamic profile and powertrain choices. Without any advanced technology like direct-injection, lightweight steel or aluminum construction or even low-rolling resistance tires, it manages a respectable 28/35 mpg IRL, while offering a practical, fun-to-drive package. The Ford F-150 has a very different mission; it must be large, durable, powerful and able to meet the needs of a full-size pickup, and will naturally be less conducive to achieving the kind of fuel economy that a Fit can.
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Unfortunately, the footprint method has the opposite effect; rather than encouraging auto makers to strive for unprecedented fuel economy in their passenger car offerings, it has incentivized auto makers to build larger cars, in particular, more car-based crossovers that can be classified as "trucks" as used to skew fleet average figures, much the same way the PT Cruiser did. Full-size trucks have become a "protected class", safe from the most aggressive targets, while compact trucks have become nearly extinct as a result.
Real world examples
Before we can delve into the demise of compact trucks, we need to examine how the footprint formula works, and how it allowed the car-based crossover to usurp the station wagon as America's family hauler of choice.
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A concrete example of this phenomenon is Volvo's decision to do away with the traditional wagon at the start of this decade. Wagons are what put Volvo on the map in North America. The rear-drive 200, 700 and 900 wagons held universal appeal for their durability and sportiness, while the 850 and V70 cemented their place in the mainstream, as a car for those who were upper-middle class, or aspiring to be.
Volvo's current lineup offers two SUVs, the XC60 and XC90 and one pseudo-wagon, the XC70. The XC70 is virtually identical to the V70, Volvo's stalwart station wagon, save for some extra ground clearance and lower body cladding. But while the V70 was classified as a passenger car, the XC70 joins its siblings as a "sports utility vehicle" according to the EPA. The fuel economy of the entire XC lineup is far from stellar. The best XC models, the front drive variants of the XC60 and XC70 with the naturally aspirated 3.2L inline-six engine, return 19/25 mpg IRL. The V70, in 2010 (its final year of sale for North America) returned 18/27 mpg IRL. All three vehicles have footprints of 48 square feet. The key difference is that while the V70 is a passenger car, the XC models are light trucks, and of course, given an easier time regarding CAFE compliance.
Mazda is another company that must also play against the stacked deck of CAFE. The Mazda6 wagon was offered here for a few years, and axed after it sold poorly. For 2014, Mazda is launching a third-generation Mazda6, including a gorgeous station wagon (and yes, a diesel engine), but it won't be coming here. Enthusiast blogs have been harping on Mazda's decision to withhold the car from the U.S. market, but a simple analysis using CAFE methodology reveals why. The wagon, with its footprint of 48 square feet, is subject to the same standards as the Volvo V70. On the other hand, the Mazda CX-5, with a footprint of 45.6 square feet, is smaller, and again, subject to light truck fuel economy standards. For a model that must be sold over 5-6 years (as previous generations were), the Mazda6 wagon starts out having to achieve a CAFE mpg figure in the high 30s.
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