As a point of safty, I would NEVER 'engine OFF coast' w/ an automatic. With a standard I'm ambivolent.
The 'trick' is Does the rpm drop to idle in neutral coast? My Infinti drops to idle, so does my Kia sportage. I think my 97 Toyota Avalon did also (that was 7 yrs ago so I'm cant say for sure)
I drove a Ford Tauras for a week and it didnot drop to idle. so there was little or no gain in mpg.
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