On our last trip,, varied from 9.8 to 11.2,,,(pen&papaer) Houston to Vegas, Zion Park, Grand Canyon, home, No actual genie use, exercised it once. Just purchased a Scan ii so will be excited to test it out, Will be able monitor speed differences better I hope. We normally drive in the 66/68mph,,, unless we started getting a significant mpg result 2/3mpg will probably not adjust our mph,,, the only way to get that would be to go to the 50ish mph ,,, I'm sure most of you can remember the oil embargo 70's when we had to drive 55,,, man I hated driving in those days, would take for ever to get any where, ouch
sparky