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How new CAFE rules will force pickup trucks to get cleaner

The PDF rules for the just-made-official new Corporate Average Fuel Economy (CAFE) standards for model year 2017-2025 vehicles that was officially finalized at 54.5 miles per gallon recently are, as previously noted, over 1,200 pages long. We've been reading through them, and found some interesting tidbits regarding the fate of better, cleaner trucks.

Scania testing economy-boosting "boat-tail" spoiler on tractor-trailers

Scania, a Swedish producer of commercial-duty trucks and buses, is testing a rear-mounted spoiler that the company claims can boost fuel economy by as much as two percent on long-haul tractor-trailers. Dubbed the "boat-tail" spoiler, Scania believes that the simple addition of some permanently affixed metal extensions mounted to the rear of a trailer can increase the economy of semis without significant cost.