[mwebb]

Originally Posted by brent777

nice chart but the mythbusters test say i will get better mpg with out my tail gate

with an OBD 2 scan tool
on a flat stretch at constant speed , say 70mph look at
the calculated load PID value
write the value down
then
reinstall the tailgate
repeat the test , same conditions , same speed , same direction

exactly

write the value down

post the results here

test = do not guess