While testing Hyundai’s new V6-powered, 4,400-pound Palisade SUV, I drove the majority of the week in Eco mode. Usually that fuel-saving mode for engine and transmission performance is a no-go for its maddeningly spongy throttle response. For those who keep an eye on the fuel gauge, the Palisade’s Eco calibration is actually usable for the majority of driving. Immediate launch power is somewhat reserved, as is close-the-gap acceleration on the highway, but in between it worked to convince me I was saving fuel and emissions in a 16.3-foot-long family hauler. It compares with the Chevrolet Traverse, Ford Explorer, Honda Pilot, Mazda CX-9, Nissan Pathfinder, Subaru Ascent, VW Atlas and platform partner, the Kia Telluride. The 2020 Palisade is sold in front- or all-wheel drive (HTRAC) models, all with a 291-horsepower 3.8-liter, Atkinson-cycle, direct-injection V-6 and eight-speed automatic transmission. The EPA fuel-economy ratings for front-drive models are 19 mpg city, 26 highway and 22 mpg combined or 19/24/21 mpg with HTRAC. In the AWD tester, I was averaging 14-21 mpg around town and I worked up to 21 mpg combined with highway driving, and it likely would have risen with more...