palemelanesian, thanks for the suggestions.
unfortunately points 1 and 3 couldn't be done because of other cars, i am doing suburban driving with lots of lights and lots of cars around. I would get many people angry if i coasted down as far as i would like to and if i didn't accelerate up to the normal speed from lights.
regarding point 2 i would make a large saving if i could shut the engine down however i am never going to do that because i am worried the car will not restart, i have had issues with this car starting before so unless i have a redundant starting system then i cant do it.
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