Quote:
Originally Posted by MetroMPG
But that doesn't make sense. In both cases (fuel cut-off state in top gear vs. engine-off in neutral) the engine is using no fuel. Yet you'll travel a shorter distance when engine braking in top gear than you will in neutral with the engine off. Whichever method takes you farthest in either case will yield maximum fuel economy overall.
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In a manual transmission, this seems right. In an automatic transmission, isn't there a small difference in the amount of fuel used after the coast? When restarting the engine after an EOC, doesn't the engine use an extra bit of fuel to start? When resuming normal driving after engine braking, this wouldn't be necessary since the transmission is already in gear and the engine is moving. Granted, this should only have a significant effect for very short EOCs. In fact, if the .2 seconds is a correct number, my whole argument is pretty irrelevant.
Anyone doing .2 second EOCs?
