Post your MPGs city- HWY. What year, what engine, mod or OE, what gears you running, and what size tires. Mine is a c1500 97 Vortec, exhaust, tuned for premium, and I get 11 city 16 HWY. 342s and 275/60/15s. I met up with a guy at the gas station last fill up, who clammed 16 city and 20 HWY. Same truck. I said man you must have 273 gears. So post yours and let see what everyone else is getting. Thanks in advance.