[PaleMelanesian]

You can rule out the ignition-on-in-gear "glide" option. It's not anything close to a glide. You're better off just running steady speed than trying an in-gear p&g routine. For a glide to be worthwhile, you need to be freewheeling and minimizing drag.

* depends on how the car handles no-throttle. Some automatics will freewheel which is good and makes for easy p&g - just let off the gas. Some hold in gear and engine brake which takes away the value of p&g unless you manually go to neutral.