Quote:
Originally Posted by MetroMPG
EPA probably can't answer your specific question, because...
The answer is: It Depends (TM).
If the additional gear choices permit you to choose an intermediate gear that gives you have a lower cruising RPM than you would otherwise, you'll save a bit of fuel.
If the top gear ratios are the same, and you spend most of your time on the highway, there will be no benefit.
EPA's blanket disclaimer is what? "Your mileage may vary."
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I think you are right that their response will be depends...but I also know they have a mountain of information and would be able shed some light on different situations and possible recommendations. Mileage will vary, and it can vary based on a number of factors. I'm pretty sure they could help if they were willing to. And it's not just highway mileage we are trying to save here is it?