Best engine RPM for fuel mileage?

[lascar]

Hi,
When I'm on the hight way I dont go up than 5000 rpm and my windscreen is at the lower position .On the others roads I dont go too much on rpm ,go slowly and look at the landscape and like that my consumption is near 7,5 liters for 100 km !!!!!!!!!!!

 

[Ride Master]

If fuel economy is the big issue; why not ride some little scooter no-ped that gets about a jillion miles to the gallon... :roflblack:

Good One, or, walk?

The only time I worry about fuel economy is when the tank is on empty and I don't see a gas station. Once I hit empty, which means I have 1-2 gallons left, I throttle back and try to hit a sweet spot, whatever that is, which was the purpose of the initial question.

I think the sweet spot is somewhere between 4000 and 5000 rpm but, on the highway traveling at 80 miles per hour to keep up with traffic, all bets are off. At lower speed and a choice of 5000 rpm in 4th gear or 4000 rpm in 5th gear the question is submitted for your comments