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Old 08-06-2013, 07:14 PM   #15 (permalink)
EcoModding Lurker
Join Date: Aug 2013
Location: Salem Oregon
Posts: 16

runnabout - '95 Honda Civic EX
90 day: 43.79 mpg (US)
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Strikes - I know this was the case for older automatic transmissions, not 100% sure about new ones, but they don't really like to be driven in neutral for long, most in neutral end up disengaging the pump for the fluid, and can over heat (info is dated, and it may be contingent on if the engine is running). Anyone else reading may be able to verify this for you. I would look for more of a lockup device with your car, many new cars actually cut fuel when you are going down hill. In my BMW when in gear and the throttle is closed there is very little if any fuel going to the engine, where as if I put it into neutral and let it idle while coasting I am using fuel. If you can lockup your torque converter while going down hill you may be able to save some.
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