Coffee Grinder wrote:
We have a 35’ F3 V10 and rarely hit 8 mpg maybe with a tail wind. We drive 65-68 @ 2400 RPM’s. I would love to know how to get to 10 mpg
As already said and indicated, slow down to where it just stays in top gear OD. Saves on other things, as well and sometimes your life, even though, you may never see 10mph.
You're driving a rolling motel there, not a sports car.
Lastly, when you're running low on cash for fuel, stay at a Walmart, which does wonders for managing fuel costs. Buy your fuel and other necessities from them during your stay, for even more savings.