ya probaly works better than 325's & 4:10's plus I'm sure our elev. is higher than your's

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I want Power, Black Smoke & Mileage guess I want my cake & eat it to

 

I get an average of 20. Worst ive seen is 17 and best is 22. All hand calculated at each fill up. I run it to an eighth and fill it all the way up. I did do full deletes with mine. I can run the interstate from Colorado springs to denver and back and only burn an eighth of a tank. Its about 175 miles round trip. Thats running 80-85mph. I have 315s with 3.73 and a G56.

 

Drove from Albuquerque to Carlsbad NM once. Never hit below 20 mpg. I was at a steady 70 all the way. Completely stock at the time. Heading back was a diff story. Elevation going back increases from about 3k to about 5500ft. Makes a big difference!