For all the talk about how boaters are energy gluttons, Intrepid's 390 Sport Yacht is at the vanguard of harnessing technology to do more while burning less fuel. Its hull is designed for efficiency, not high speed. It's powered by outboards, which deliver the best power-to-weight ratio. And its highly engineered fiberglass laminate is a combination of cored, vacuum-bagged, resin-infused, uni- and multi-directional fibers that delivers strength and stiffness without horsepower-robbing, fuel-consuming excess weight. By winning this techno-trifecta - design, construction, propulsion - the 390 Sport Yacht delivers a range of speeds at which economy exceeds a mile per gallon. There's no fleeting, single-speed "sweet spot." Just set the tachs between 3000 and 4500 rpm and go. This 40' performance cruiser delivers outstanding performance, and while some tractor-, pod- and stern drive-powered cruisers can match it, none can multitask like this boat.