You should really get out more.
Even checking your local Cincinnati prices, Diesel is 1.95 and reg is 1.59
Those numbers are from gasbuddy.com
So less than 20% difference for those with a calculator
So that's $13.65 for Diesel, and $22.26 for gas
A difference of $8.61 for every 100 miles using your own mpg numbers.
To each his own, but to claim a 8.1 is BETTER than a 7.3 PSD because of the power it has it retarded.
Especially when it gets HALF the fuel mileage regardless of conditions.
And seeing that you think the 8.1 has
All the torque, double the horsepower
i feel inclined to correct you.
2002 8.1L suburban
330 hp @ 4200 RPM
450 lb.-ft. @ 3200 RPM
A 2002 7.3L Excursion
275 hp @ 2800 RPM
525 @ 1600 RPM
So in fact, it does NOT have all the torque of a similar vintage 7.3, nor does it have double the hp.
Looking at it another way... you get HALF the fuel mileage having just 17% more hp and 15% less torque.