Eggman's right: Coast in neutral if your goal is to decelerate (while using no fuel, until combustion resumes when engine RPM drops below a certain threshold).
Coast in neutral if you want to maximize coasting distance while consuming very little fuel.
Each technique is useful in different situations.
Impressive numbers, Casey!
View my fuel log 2015 Mirage ES 1.2 automatic: 40.4 mpg (US) ... 17.2 km/L ... 5.8 L/100 km ... 48.5 mpg (Imp)
I notice the CVT does odd things when you crest a hill and take your foot of the gas, I can't quite work out what it's doing though, it seems to be almost downshifting ratios to apply engine braking, all I know is that the rpm suddenly goes up, might be something weird with my car only though.
Potentially the last fill-up for Mirage #2 (assuming I end up selling it and keeping Mirage #3, and not vice-versa)...
78.5 MPG US or 3.0 L/100 km over 757 km.
This was just a test to see if I could break 75 MPG using a lot of "pulse & glide". Also, the alternator was disconnected for probably 90% of the tank.
Is 80+ MPG possible? Sure. How much effort do you want to put in, and how slow an average speed are you willing to accept?
I think the ScanGauge said my average speed was around 30 mph for the tank. Though that includes the average being reduced by time spent stopped at stop signs, lights, when parking, etc. The average driving speed would have been around 40-ish, if I had to guess.
View my fuel log 2015 Mirage ES 1.2 manual: 49.6 mpg (US) ... 21.1 km/L ... 4.7 L/100 km ... 59.5 mpg (Imp)