Here's my fuel data over the last 6 months, covers the wheel change. Pulled old wheels off & sold them which went towards the new wheels (lightest OEMs available). Rotating mass drop helped throttle response... every start (rolling, throttle up) event, hill climb, rush hour traffic drive etc has benefited from it. I agree that steady state mpg does not change much and have observed my steady state mpg stay pretty much the same while the commute mpg with every day driving, cold starts etc has gone up. Heck I get equal or better mpg commuting to work than I do on the hiway for long stretches. (manual trans truck so I can coast a lot in traffic & down hills)
11 years, 345k on the clock, time for a makeover... - Dodge Cummins Diesel Forum