I'm driving a non-hybrid Accord with a manual transmission. Up until now (for years) I have tried my best to anticipate traffic and slow down without using the brakes. The thing is, I have always allowed the car to slow down in gear. This includes down-hill, coasting toward traffic controls, turns, etc. I used to think that this was the best way to do it since the injectors pretty much shut down in this state. I should disclaim that for the moment I'm not quite sold on ignition-off coasting. But even so, doesn't it make a whole lot more sense to take the car out of gear and let it idle while I coast vs. leaving it in gear? Not only does the car not slow down nearly as fast (if it does at all) but the overall friction losses decrease since the engine is turring at 1/2 the speed or lower. It seems to me that my overall consumption could be dramatically lower in the right circumstances. Especially if I can take my foot off the gas for long distances at higher speeds. Perhaps the optimal approach is a neutral-coast most of the time and engine brake when I know I need to reduce speed?