Studying the fuel economy difference between the
1992 Ram Magnum 5.2 V8 and the
1994 Ram Magnum V10
is a valuable way to build knowledge.

How does engine size, gearing, aerodynamics and weight affect pickup truck fuel economy?

An (almost) silly question:

On a level blacktop highway how much of a pure tailwind speed does a
1971 4wd Ram with a 440 V8, manual trans and 3.92 diff
have to have blowing to match the zero windspeed MPG of a
1994 4wd Ram with a Magnum 5.2 V8 46RH and 3.21 diff ?

The Windows computer program “Fuel Economy Calculator”
from Performance Trends Company
is the only under $200 program I know of
that can give a plus or minus 7% answer
to that question.