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Do you think it uses less gas to do engine off coasting?
That converts to roughly 1/65th of a gallon every minute.
The amount of time I probably EOC every 60 miles is about 5 minutes I think. Not this tank, but that's about the upper potential based on my most common route and driving style. So on a 500 mile tank that's about 42 minutes that otherwise would be engine idling. Wow, that actually is somewhat significant amount of gas saved. .65 gallons. but then you have to figure FE lost to o2 sensor getting cool from engine being off and lean-burn taking longer to kick back in once engine back on. (So I've been told)
If there is no penalty for turning the engine back on after EOC, then based on my calculations it equates to a 5mpg increase from 58 to 63 to do EOC. My idle is probably using more fuel than yours since I have a surging idle.
Calculations assuming you are going 60mph idling on the highway.
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three stripes the charm!
Car mods are overrated. Just gotta adjust that nut behind the wheel for best mpg. 
Forget about World Peace...Visualize using your turn signal.
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1993CivicVX 
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