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Discussion Starter · #1 ·
I drove from Philly to Washington this weekend.... I was doing between 70-90mph the whole time and the car never went past 4th gear. I did this intentionally (it's a manual). I found that of course the acceleration was much more on tap, but even better - my miles per gallon jumped UP 2mpg!!! The car was around 4-4.5k most of the time.

Is this a "duh"? Or are there any negative effects from not using 5th gear?
 

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No real reason to. This is why I really want a lower diff in my car. It's not like I'll miss anything off the top end.
 
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