Oh right, the SkyA-D. Yes that is questionable for diesels. There are many theories out there that accelerating swiftly in the sweet spot of the diesel BSFC map then coasting can lead to marginally better fuel economy. I have yet to test a modern diesel in such a manner granted I've had some experience with the twin turbo BMW 3.0L diesel and the notorious 4cyl VW/Audi TDI. Both obviously return great gas mileage without effort in paying attention to light throttle inputs.