Incredibly-not-serious-and-AI-aided-back-of-envelope Math, but STILL: an 8.3L engine uses .3 milliliters of gas every rev. that's a gallon every 12,000 revs. That's 8 minutes of driving at 1,500RPM, which will probably get you to 60MPH. That's 7.5 MPG, unless im missing some Car Talk Math.
And the automaker isn’t shying away from calling out the competition on the other side of Detroit.