If I recall, David used less fuel than Poobs (Ed Pataky) each leg of the flight from
Huston to Clinton the year they Flew together.

Just because 150 might have 150 HP hanging on the nose doesn't mean you have to use them all during the entire flight.
Throttle back to normal 150 speeds and burn normal 150 amounts of fuel.

Ron Stewart
N5282B
KSFZ


[Linked Image from visitedstatesmap.com]