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It seems obvious that getting as fast as possible into final gear is the key to best fuel economy, for as long as the RPMs aren't too low, and the engine isn't lugging.
When in last gear, the slower you accelerate, the better the MPG, because the slower the speed will be.
I think when talking about acceleration, it's the process between a departure from standstill, to that final gear; and what the best form of acceleration is.
For instance, suppose you'd only be going 40MPH.
What is the best MPG for acceleration?
Is it 1st, 2nd, 3rd, 4th, 5th, 6th?
Or could it be 1st, 3rd, 6th?
How deep should the pedal be pressed, at what RPM should the engine be kept?
And what if coasting at 40MPH in 6th; and one wants to accelerate to 80MPH.
Does one get better MPG shifting into 5th, or keep on accelerating in 6th, even when the acceleration is very fast?
I think those are the most important questions to ask and see answered.
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