There's a touch of 'emperor's new clothes' with outboards these days. Many think that they must have four stoke, but when pressed, they don't really know why. Four strokes probably are the future, but for me, they aren't yet. Right now, my Etec is the gruntiest, meanest mother that I can put on my boat this side of a full race lump, for little or no loss of economy. It's not perfect, but I like it.