13 Speed Fuel Mileage

If it wasn't for wind resistance. You'd only need 5 horsepower to propel you 100 mph.
Now i don't know if that statement refers to bicycles or fully grossed and oversized semi's. But it's a little food for thought.

My 2016 FL averaged about 6.0 on the west coast pulling flat. 5.8 in the winter.

 

The key to high MPG is to only drive "downhill".

 

Your right, You should have...

 

If your 13 is a double over drive then 12th or 8L will still be an od gear. You'd have to run 7h before you'd be direct. If your 13sp model number ends with an a it's a double over drive.

 

best mileage is supposed to be in direct at 20% below rated but w/ electronics running at 1200 is engineered to be best. momentum to avoid shifting in hills is key (like in Iowa )

 

Now this I am a little curious about. I am in a 2015 T680 13 speed and my mileage is 5.5 range. If I keep my rpm's in the sweet spot, around 1425 at either 60 or 70 then you're saying that I will be more efficient at 60 rather than 70?

 

I am running west coast so there's some good hills getting there, some good hills there, then more hills getting back. If I am running in the 60 to 65 range to be economical and get decent mileage then how does one gain enough momentum to keep from shifting so much?