Long-term investments in fuel efficiency-especially those undertaken by small businesses, like owner-operators-make a lot more sense when high fuel prices are a long-term certainty. Uncertainty about fuel prices is another. A set of TrailerTails costs around $2,200, according to Arvigo, though volume discounts are available to fleets. If side skirts and tail fairings are so great, why doesn’t every long-haul truck have them? Price is one reason. So each time a long-haul trucker installs tail fairings, that’s the rough global-warming equivalent of taking a car off the road. According to the EPA, the average car emits about 5.1 metric tons of CO 2 per year. How green, exactly, are side skirts and tail fairings? Crystal Arvigo told me that tail fairings on a long-haul trailer that does 60,000 miles per year can save 480 gallons of diesel fuel, which equates to 10,752 lbs, or 4.9 metric tons, of CO 2 that is not emitted.
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