My milege is the same as JBone. Just got back from FLA. (to N. C. ) running 75 to 80 mph on I-95, pulling 5-9 psi of boost, EGT running 800* (maybe a shade on over 900* on uphill pulls) and 16 mpg was the best I could do. I was running bobtail. The best mpg I've got was 18. 5. 2001. 5 ETH/DEE. Old Man.